diff --git a/server/internal/service/verification_service_test.go b/server/internal/service/verification_service_test.go
new file mode 100644
index 0000000..eb8a619
--- /dev/null
+++ b/server/internal/service/verification_service_test.go
@@ -0,0 +1,159 @@
+package service
+
+import (
+	"context"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+	"time"
+
+	"backupx/server/internal/backup"
+	"backupx/server/internal/config"
+	"backupx/server/internal/database"
+	"backupx/server/internal/logger"
+	"backupx/server/internal/model"
+	"backupx/server/internal/repository"
+	"backupx/server/internal/storage"
+	"backupx/server/internal/storage/codec"
+	storageRclone "backupx/server/internal/storage/rclone"
+)
+
+type verifyTestHarness struct {
+	verify     *VerificationService
+	execution  *BackupExecutionService
+	records    repository.BackupRecordRepository
+	storageDir string
+}
+
+func newVerifyTestHarness(t *testing.T) *verifyTestHarness {
+	t.Helper()
+	baseDir := t.TempDir()
+	sourceDir := filepath.Join(baseDir, "source")
+	storageDir := filepath.Join(baseDir, "storage")
+	if err := os.MkdirAll(sourceDir, 0o755); err != nil {
+		t.Fatalf("mkdir source: %v", err)
+	}
+	if err := os.WriteFile(filepath.Join(sourceDir, "index.html"), []byte("hello-verify"), 0o644); err != nil {
+		t.Fatalf("write source: %v", err)
+	}
+	log, err := logger.New(config.LogConfig{Level: "error"})
+	if err != nil {
+		t.Fatalf("logger.New: %v", err)
+	}
+	db, err := database.Open(config.DatabaseConfig{Path: filepath.Join(baseDir, "backupx.db")}, log)
+	if err != nil {
+		t.Fatalf("database.Open: %v", err)
+	}
+	cipher := codec.NewConfigCipher("verify-secret")
+	targets := repository.NewStorageTargetRepository(db)
+	tasks := repository.NewBackupTaskRepository(db)
+	records := repository.NewBackupRecordRepository(db)
+	verifications := repository.NewVerificationRecordRepository(db)
+	nodes := repository.NewNodeRepository(db)
+	targetCipher, err := cipher.EncryptJSON(map[string]any{"basePath": storageDir})
+	if err != nil {
+		t.Fatalf("EncryptJSON: %v", err)
+	}
+	if err := targets.Create(context.Background(), &model.StorageTarget{Name: "local", Type: string(storage.ProviderTypeLocalDisk), Enabled: true, ConfigCiphertext: targetCipher, ConfigVersion: 1, LastTestStatus: "unknown"}); err != nil {
+		t.Fatalf("create target: %v", err)
+	}
+	task := &model.BackupTask{Name: "verify-test", Type: "file", Enabled: true, SourcePath: sourceDir, StorageTargetID: 1, NodeID: 0, RetentionDays: 30, Compression: "gzip", MaxBackups: 10, LastStatus: "idle"}
+	if err := tasks.Create(context.Background(), task); err != nil {
+		t.Fatalf("create task: %v", err)
+	}
+
+	logHub := backup.NewLogHub()
+	runnerRegistry := backup.NewRegistry(backup.NewFileRunner(), backup.NewSQLiteRunner(), backup.NewMySQLRunner(nil), backup.NewPostgreSQLRunner(nil))
+	storageRegistry := storage.NewRegistry(storageRclone.NewLocalDiskFactory())
+	execution := NewBackupExecutionService(tasks, records, targets, storageRegistry, runnerRegistry, logHub, nil, cipher, nil, baseDir, 2, 10, "")
+	verify := NewVerificationService(verifications, records, tasks, targets, nodes, storageRegistry, backup.NewLogHub(), cipher, baseDir, 2)
+
+	return &verifyTestHarness{verify: verify, execution: execution, records: records, storageDir: storageDir}
+}
+
+// runVerify 同步执行一次验证并返回终态记录。
+func (h *verifyTestHarness) runVerify(t *testing.T, backupRecordID uint) *VerificationRecordDetail {
+	t.Helper()
+	ctx := context.Background()
+	done := make(chan struct{})
+	h.verify.async = func(job func()) {
+		go func() { job(); close(done) }()
+	}
+	detail, err := h.verify.Start(ctx, backupRecordID, "quick", "tester")
+	if err != nil {
+		t.Fatalf("verify Start: %v", err)
+	}
+	select {
+	case <-done:
+	case <-time.After(15 * time.Second):
+		t.Fatal("verify did not complete in time")
+	}
+	final, err := h.verify.Get(ctx, detail.ID)
+	if err != nil {
+		t.Fatalf("verify Get: %v", err)
+	}
+	return final
+}
+
+// TestVerificationService_Success 覆盖正常路径：对一个有效（gzip 压缩）的备份做验证应通过。
+// 同时回归保护 #77——新增的 SHA-256 校验不得误伤合法的压缩备份。
+func TestVerificationService_Success(t *testing.T) {
+	h := newVerifyTestHarness(t)
+	backupDetail, err := h.execution.RunTaskByIDSync(context.Background(), 1)
+	if err != nil {
+		t.Fatalf("RunTaskByIDSync: %v", err)
+	}
+	if backupDetail.Status != "success" {
+		t.Fatalf("expected backup success, got %s", backupDetail.Status)
+	}
+
+	final := h.runVerify(t, backupDetail.ID)
+	if final.Status != model.VerificationRecordStatusSuccess {
+		t.Fatalf("expected verify success, got %s (err=%s)", final.Status, final.ErrorMessage)
+	}
+}
+
+// TestVerificationService_RejectsCorruptedBackup 验证 #77 的完整性校验：
+// 存储对象被损坏时验证必须失败并给出 checksum 失败信息。
+func TestVerificationService_RejectsCorruptedBackup(t *testing.T) {
+	h := newVerifyTestHarness(t)
+	backupDetail, err := h.execution.RunTaskByIDSync(context.Background(), 1)
+	if err != nil {
+		t.Fatalf("RunTaskByIDSync: %v", err)
+	}
+	if backupDetail.Status != "success" {
+		t.Fatalf("expected backup success, got %s", backupDetail.Status)
+	}
+
+	// 破坏已存储的备份对象，使其 SHA-256 与记录不符。
+	corrupted := false
+	if walkErr := filepath.Walk(h.storageDir, func(p string, info os.FileInfo, walkErr error) error {
+		if walkErr != nil || info.IsDir() {
+			return walkErr
+		}
+		f, openErr := os.OpenFile(p, os.O_APPEND|os.O_WRONLY, 0o644)
+		if openErr != nil {
+			return openErr
+		}
+		defer f.Close()
+		if _, writeErr := f.WriteString("corrupt"); writeErr != nil {
+			return writeErr
+		}
+		corrupted = true
+		return nil
+	}); walkErr != nil {
+		t.Fatalf("corrupt walk: %v", walkErr)
+	}
+	if !corrupted {
+		t.Fatal("did not find a stored backup object to corrupt")
+	}
+
+	final := h.runVerify(t, backupDetail.ID)
+	if final.Status != model.VerificationRecordStatusFailed {
+		t.Fatalf("expected verify to FAIL on corrupted backup, got %s", final.Status)
+	}
+	if !strings.Contains(final.ErrorMessage, "完整性校验失败") && !strings.Contains(final.ErrorMessage, "SHA-256") {
+		t.Fatalf("expected checksum failure message, got %q", final.ErrorMessage)
+	}
+}