diff --git a/HISTORY.md b/HISTORY.md
index 072ddac0..bb49b1c6 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -4,6 +4,7 @@
 
 **Features**
 
+- support new variable notation ${var}
 - use \$\$ to escape \$ notation
 
 **Bugfixes**
diff --git a/httprunner/parser.py b/httprunner/parser.py
index e74919ac..f80af2d0 100644
--- a/httprunner/parser.py
+++ b/httprunner/parser.py
@@ -9,10 +9,9 @@ from httprunner.compat import basestring, builtin_str, numeric_types, str
 
 # use $$ to escape $ notation
 dolloar_regex_compile = re.compile(r"\$\$")
-# TODO: change variable notation from $var to {{var}}
-# $var_1
-variable_regex_compile = re.compile(r"\$(\w+)")
-# ${func1($var_1, $var_3)}
+# variable notation, e.g. ${var} or $var
+variable_regex_compile = re.compile(r"\$\{(\w+)\}|\$(\w+)")
+# function notation, e.g. ${func1($var_1, $var_3)}
 function_regex_compile = re.compile(r"\$\{(\w+)\(([\$\w\.\-/\s=,]*)\)\}")
 
 
@@ -70,7 +69,12 @@ def regex_findall_variables(content):
 
     """
     try:
-        return variable_regex_compile.findall(content)
+        vars_list = []
+        for var_tuple in variable_regex_compile.findall(content):
+            vars_list.append(
+                var_tuple[0] or var_tuple[1]
+            )
+        return vars_list
     except TypeError:
         return []
 
@@ -477,10 +481,10 @@ class LazyString(object):
                 self._string += "{}"
                 continue
 
-            # search variable like $var
+            # search variable like ${var} or $var
             var_match = variable_regex_compile.match(raw_string, match_start_position)
             if var_match:
-                var_name = var_match.group(1)
+                var_name = var_match.group(1) or var_match.group(2)
                 # check if any variable undefined in check_variables_set
                 if var_name not in self.check_variables_set:
                     raise exceptions.VariableNotFound(var_name)
diff --git a/tests/test_parser.py b/tests/test_parser.py
index 3c2a0455..57945547 100644
--- a/tests/test_parser.py
+++ b/tests/test_parser.py
@@ -37,6 +37,10 @@ class TestParserBasic(unittest.TestCase):
             parser.regex_findall_variables("a$var"),
             ["var"]
         )
+        self.assertEqual(
+            parser.regex_findall_variables("a$var${var2}$var3${var4}"),
+            ["var", "var2", "var3", "var4"]
+        )
         self.assertEqual(
             parser.regex_findall_variables("$v ar"),
             ["v"]
@@ -281,7 +285,7 @@ class TestParserBasic(unittest.TestCase):
             {"abc": "def"}
         )
 
-    def test_lazy_string(self):
+    def test_parse_func_var_abnormal(self):
         variables_mapping = {
             "var_1": "abc",
             "var_2": "def",
@@ -295,6 +299,150 @@ class TestParserBasic(unittest.TestCase):
             "func1": lambda x,y: str(x) + str(y)
         }
 
+        # {
+        var = parser.LazyString("ABC$var_1{", functions_mapping, check_variables_set)
+        self.assertEqual(var._string, "ABC{}{{")
+        self.assertEqual(var._args, ["var_1"])
+        self.assertEqual(var.to_value(variables_mapping), "ABCabc{")
+
+        # }
+        var = parser.LazyString("ABC$var_1}", functions_mapping, check_variables_set)
+        self.assertEqual(var._string, "ABC{}}}")
+        self.assertEqual(var._args, ["var_1"])
+        self.assertEqual(var.to_value(variables_mapping), "ABCabc}")
+
+        # $$
+        var = parser.LazyString("ABC$$var_1{", functions_mapping, check_variables_set)
+        self.assertEqual(var._string, "ABC$var_1{{")
+        self.assertEqual(var._args, [])
+        self.assertEqual(var.to_value(variables_mapping), "ABC$var_1{")
+
+        # $$$
+        var = parser.LazyString("ABC$$$var_1{", functions_mapping, check_variables_set)
+        self.assertEqual(var._string, "ABC${}{{")
+        self.assertEqual(var._args, ["var_1"])
+        self.assertEqual(var.to_value(variables_mapping), "ABC$abc{")
+
+        # $$$$
+        var = parser.LazyString("ABC$$$$var_1{", functions_mapping, check_variables_set)
+        self.assertEqual(var._string, "ABC$$var_1{{")
+        self.assertEqual(var._args, [])
+        self.assertEqual(var.to_value(variables_mapping), "ABC$$var_1{")
+
+        # ${
+        var = parser.LazyString("ABC$var_1${", functions_mapping, check_variables_set)
+        self.assertEqual(var._string, "ABC{}${{")
+        self.assertEqual(var._args, ["var_1"])
+        self.assertEqual(var.to_value(variables_mapping), "ABCabc${")
+
+        var = parser.LazyString("ABC$var_1${a", functions_mapping, check_variables_set)
+        self.assertEqual(var._string, "ABC{}${{a")
+        self.assertEqual(var._args, ["var_1"])
+        self.assertEqual(var.to_value(variables_mapping), "ABCabc${a")
+
+        # $}
+        var = parser.LazyString("ABC$var_1$}a", functions_mapping, check_variables_set)
+        self.assertEqual(var._string, "ABC{}$}}a")
+        self.assertEqual(var._args, ["var_1"])
+        self.assertEqual(var.to_value(variables_mapping), "ABCabc$}a")
+
+        # }{
+        var = parser.LazyString("ABC$var_1}{a", functions_mapping, check_variables_set)
+        self.assertEqual(var._string, "ABC{}}}{{a")
+        self.assertEqual(var._args, ["var_1"])
+        self.assertEqual(var.to_value(variables_mapping), "ABCabc}{a")
+
+        # {}
+        var = parser.LazyString("ABC$var_1{}a", functions_mapping, check_variables_set)
+        self.assertEqual(var._string, "ABC{}{{}}a")
+        self.assertEqual(var._args, ["var_1"])
+        self.assertEqual(var.to_value(variables_mapping), "ABCabc{}a")
+
+    def test_parse_func_var_duplicate(self):
+        variables_mapping = {
+            "var_1": "abc",
+            "var_2": "def",
+            "var_3": 123,
+            "var_4": {"a": 1},
+            "var_5": True,
+            "var_6": None
+        }
+        check_variables_set = variables_mapping.keys()
+        functions_mapping = {
+            "func1": lambda x,y: str(x) + str(y)
+        }
+        var = parser.LazyString(
+            "ABC${func1($var_1, $var_3)}--${func1($var_1, $var_3)}",
+            functions_mapping,
+            check_variables_set
+        )
+        self.assertEqual(var._string, "ABC{}--{}")
+        self.assertEqual(var.to_value(variables_mapping), "ABCabc123--abc123")
+
+        var = parser.LazyString("ABC${func1($var_1, $var_3)}$var_1", functions_mapping, check_variables_set)
+        self.assertEqual(var._string, "ABC{}{}")
+        self.assertEqual(var.to_value(variables_mapping), "ABCabc123abc")
+
+        var = parser.LazyString(
+            "ABC${func1($var_1, $var_3)}$var_1--${func1($var_1, $var_3)}$var_1",
+            functions_mapping,
+            check_variables_set
+        )
+        self.assertEqual(var._string, "ABC{}{}--{}{}")
+        self.assertEqual(var.to_value(variables_mapping), "ABCabc123abc--abc123abc")
+
+    def test_parse_function(self):
+        variables_mapping = {
+            "var_1": "abc",
+            "var_2": "def",
+            "var_3": 123,
+            "var_4": {"a": 1},
+            "var_5": True,
+            "var_6": None
+        }
+        check_variables_set = variables_mapping.keys()
+        functions_mapping = {
+            "func1": lambda x,y: str(x) + str(y)
+        }
+
+        var = parser.LazyString("${func1($var_1, $var_3)}", functions_mapping, check_variables_set)
+        self.assertEqual(var._string, "{}")
+        self.assertIsInstance(var._args[0], parser.LazyFunction)
+        self.assertEqual(var.to_value(variables_mapping), "abc123")
+
+        var = parser.LazyString("ABC${func1($var_1, $var_3)}DE", functions_mapping, check_variables_set)
+        self.assertEqual(var._string, "ABC{}DE")
+        self.assertIsInstance(var._args[0], parser.LazyFunction)
+        self.assertEqual(var.to_value(variables_mapping), "ABCabc123DE")
+
+        var = parser.LazyString("ABC${func1($var_1, $var_3)}$var_5", functions_mapping, check_variables_set)
+        self.assertEqual(var._string, "ABC{}{}")
+        self.assertEqual(var.to_value(variables_mapping), "ABCabc123True")
+
+        var = parser.LazyString("ABC${func1($var_1, $var_3)}DE$var_4", functions_mapping, check_variables_set)
+        self.assertEqual(var._string, "ABC{}DE{}")
+        self.assertEqual(var.to_value(variables_mapping), "ABCabc123DE{'a': 1}")
+
+        var = parser.LazyString("ABC$var_5${func1($var_1, $var_3)}", functions_mapping, check_variables_set)
+        self.assertEqual(var._string, "ABC{}{}")
+        self.assertEqual(var.to_value(variables_mapping), "ABCTrueabc123")
+
+
+    def test_parse_variable(self):
+        """ variable format ${var} and $var
+        """
+        variables_mapping = {
+            "var_1": "abc",
+            "var_2": "def",
+            "var_3": 123,
+            "var_4": {"a": 1},
+            "var_5": True,
+            "var_6": None
+        }
+        check_variables_set = variables_mapping.keys()
+        functions_mapping = {}
+
+        # format: $var
         var = parser.LazyString("ABC$var_1", functions_mapping, check_variables_set)
         self.assertEqual(var._string, "ABC{}")
         self.assertEqual(var._args, ["var_1"])
@@ -325,56 +473,6 @@ class TestParserBasic(unittest.TestCase):
         self.assertEqual(var._args, ["var_1", "var_1"])
         self.assertEqual(var.to_value(variables_mapping), "ABCabc/123abc/456")
 
-        var = parser.LazyString("ABC$var_1{", functions_mapping, check_variables_set)
-        self.assertEqual(var._string, "ABC{}{{")
-        self.assertEqual(var._args, ["var_1"])
-        self.assertEqual(var.to_value(variables_mapping), "ABCabc{")
-
-        var = parser.LazyString("ABC$var_1}", functions_mapping, check_variables_set)
-        self.assertEqual(var._string, "ABC{}}}")
-        self.assertEqual(var._args, ["var_1"])
-        self.assertEqual(var.to_value(variables_mapping), "ABCabc}")
-
-        var = parser.LazyString("ABC$$var_1{", functions_mapping, check_variables_set)
-        self.assertEqual(var._string, "ABC$var_1{{")
-        self.assertEqual(var._args, [])
-        self.assertEqual(var.to_value(variables_mapping), "ABC$var_1{")
-
-        var = parser.LazyString("ABC$$$var_1{", functions_mapping, check_variables_set)
-        self.assertEqual(var._string, "ABC${}{{")
-        self.assertEqual(var._args, ["var_1"])
-        self.assertEqual(var.to_value(variables_mapping), "ABC$abc{")
-
-        var = parser.LazyString("ABC$$$$var_1{", functions_mapping, check_variables_set)
-        self.assertEqual(var._string, "ABC$$var_1{{")
-        self.assertEqual(var._args, [])
-        self.assertEqual(var.to_value(variables_mapping), "ABC$$var_1{")
-
-        var = parser.LazyString("ABC$var_1${", functions_mapping, check_variables_set)
-        self.assertEqual(var._string, "ABC{}${{")
-        self.assertEqual(var._args, ["var_1"])
-        self.assertEqual(var.to_value(variables_mapping), "ABCabc${")
-
-        var = parser.LazyString("ABC$var_1${a", functions_mapping, check_variables_set)
-        self.assertEqual(var._string, "ABC{}${{a")
-        self.assertEqual(var._args, ["var_1"])
-        self.assertEqual(var.to_value(variables_mapping), "ABCabc${a")
-
-        var = parser.LazyString("ABC$var_1$}a", functions_mapping, check_variables_set)
-        self.assertEqual(var._string, "ABC{}$}}a")
-        self.assertEqual(var._args, ["var_1"])
-        self.assertEqual(var.to_value(variables_mapping), "ABCabc$}a")
-
-        var = parser.LazyString("ABC$var_1}{a", functions_mapping, check_variables_set)
-        self.assertEqual(var._string, "ABC{}}}{{a")
-        self.assertEqual(var._args, ["var_1"])
-        self.assertEqual(var.to_value(variables_mapping), "ABCabc}{a")
-
-        var = parser.LazyString("ABC$var_1{}a", functions_mapping, check_variables_set)
-        self.assertEqual(var._string, "ABC{}{{}}a")
-        self.assertEqual(var._args, ["var_1"])
-        self.assertEqual(var.to_value(variables_mapping), "ABCabc{}a")
-
         var = parser.LazyString("ABC$var_1/$var_2/$var_1", functions_mapping, check_variables_set)
         self.assertEqual(var._string, "ABC{}/{}/{}")
         self.assertEqual(var._args, ["var_1", "var_2", "var_1"])
@@ -385,47 +483,46 @@ class TestParserBasic(unittest.TestCase):
         self.assertEqual(var._args, ["var_1", "var_3"])
         self.assertEqual(var.to_value(variables_mapping), "func1(abc, 123)")
 
-        var = parser.LazyString("${func1($var_1, $var_3)}", functions_mapping, check_variables_set)
-        self.assertEqual(var._string, "{}")
-        self.assertIsInstance(var._args[0], parser.LazyFunction)
-        self.assertEqual(var.to_value(variables_mapping), "abc123")
+        # format: ${var}
+        var = parser.LazyString("ABC${var_1}", functions_mapping, check_variables_set)
+        self.assertEqual(var._string, "ABC{}")
+        self.assertEqual(var._args, ["var_1"])
+        self.assertEqual(var.to_value(variables_mapping), "ABCabc")
 
-        var = parser.LazyString("ABC${func1($var_1, $var_3)}DE", functions_mapping, check_variables_set)
-        self.assertEqual(var._string, "ABC{}DE")
-        self.assertIsInstance(var._args[0], parser.LazyFunction)
-        self.assertEqual(var.to_value(variables_mapping), "ABCabc123DE")
-
-        var = parser.LazyString("ABC${func1($var_1, $var_3)}$var_5", functions_mapping, check_variables_set)
+        var = parser.LazyString("ABC${var_1}${var_3}", functions_mapping, check_variables_set)
         self.assertEqual(var._string, "ABC{}{}")
-        self.assertEqual(var.to_value(variables_mapping), "ABCabc123True")
+        self.assertEqual(var._args, ["var_1", "var_3"])
+        self.assertEqual(var.to_value(variables_mapping), "ABCabc123")
 
-        var = parser.LazyString(
-            "ABC${func1($var_1, $var_3)}--${func1($var_1, $var_3)}",
-            functions_mapping,
-            check_variables_set
-        )
-        self.assertEqual(var._string, "ABC{}--{}")
-        self.assertEqual(var.to_value(variables_mapping), "ABCabc123--abc123")
+        var = parser.LazyString("ABC${var_1}/${var_3}", functions_mapping, check_variables_set)
+        self.assertEqual(var._string, "ABC{}/{}")
+        self.assertEqual(var._args, ["var_1", "var_3"])
+        self.assertEqual(var.to_value(variables_mapping), "ABCabc/123")
 
-        var = parser.LazyString("ABC${func1($var_1, $var_3)}$var_1", functions_mapping, check_variables_set)
-        self.assertEqual(var._string, "ABC{}{}")
-        self.assertEqual(var.to_value(variables_mapping), "ABCabc123abc")
+        var = parser.LazyString("ABC${var_1}/", functions_mapping, check_variables_set)
+        self.assertEqual(var._string, "ABC{}/")
+        self.assertEqual(var._args, ["var_1"])
+        self.assertEqual(var.to_value(variables_mapping), "ABCabc/")
 
-        var = parser.LazyString(
-            "ABC${func1($var_1, $var_3)}$var_1--${func1($var_1, $var_3)}$var_1",
-            functions_mapping,
-            check_variables_set
-        )
-        self.assertEqual(var._string, "ABC{}{}--{}{}")
-        self.assertEqual(var.to_value(variables_mapping), "ABCabc123abc--abc123abc")
+        var = parser.LazyString("ABC${var_1}123", functions_mapping, check_variables_set)
+        self.assertEqual(var._string, "ABC{}123")
+        self.assertEqual(var._args, ["var_1"])
+        self.assertEqual(var.to_value(variables_mapping), "ABCabc123")
 
-        var = parser.LazyString("ABC${func1($var_1, $var_3)}DE$var_4", functions_mapping, check_variables_set)
-        self.assertEqual(var._string, "ABC{}DE{}")
-        self.assertEqual(var.to_value(variables_mapping), "ABCabc123DE{'a': 1}")
+        var = parser.LazyString("ABC${var_1}/123${var_1}/456", functions_mapping, check_variables_set)
+        self.assertEqual(var._string, "ABC{}/123{}/456")
+        self.assertEqual(var._args, ["var_1", "var_1"])
+        self.assertEqual(var.to_value(variables_mapping), "ABCabc/123abc/456")
 
-        var = parser.LazyString("ABC$var_5${func1($var_1, $var_3)}", functions_mapping, check_variables_set)
-        self.assertEqual(var._string, "ABC{}{}")
-        self.assertEqual(var.to_value(variables_mapping), "ABCTrueabc123")
+        var = parser.LazyString("ABC${var_1}/${var_2}/${var_1}", functions_mapping, check_variables_set)
+        self.assertEqual(var._string, "ABC{}/{}/{}")
+        self.assertEqual(var._args, ["var_1", "var_2", "var_1"])
+        self.assertEqual(var.to_value(variables_mapping), "ABCabc/def/abc")
+
+        var = parser.LazyString("func1(${var_1}, ${var_3})", functions_mapping, check_variables_set)
+        self.assertEqual(var._string, "func1({}, {})")
+        self.assertEqual(var._args, ["var_1", "var_3"])
+        self.assertEqual(var.to_value(variables_mapping), "func1(abc, 123)")
 
     def test_parse_data_multiple_identical_variables(self):
         variables_mapping = {