diff --git a/expression/builtin_json_vec.go b/expression/builtin_json_vec.go
index dfdad788380dc..8b594b767590b 100644
--- a/expression/builtin_json_vec.go
+++ b/expression/builtin_json_vec.go
@@ -252,9 +252,31 @@ func (b *builtinJSONArrayAppendSig) vecEvalJSON(input *chunk.Chunk, result *chun
 }
 
 func (b *builtinJSONUnquoteSig) vectorized() bool {
-	return false
+	return true
 }
 
 func (b *builtinJSONUnquoteSig) vecEvalString(input *chunk.Chunk, result *chunk.Column) error {
-	return errors.Errorf("not implemented")
+	n := input.NumRows()
+	buf, err := b.bufAllocator.get(types.ETJson, n)
+	if err != nil {
+		return err
+	}
+	defer b.bufAllocator.put(buf)
+	if err := b.args[0].VecEvalJSON(b.ctx, input, buf); err != nil {
+		return err
+	}
+
+	result.ReserveString(n)
+	for i := 0; i < n; i++ {
+		if buf.IsNull(i) {
+			result.AppendNull()
+			continue
+		}
+		res, err := buf.GetJSON(i).Unquote()
+		if err != nil {
+			return err
+		}
+		result.AppendString(res)
+	}
+	return nil
 }
diff --git a/expression/builtin_json_vec_test.go b/expression/builtin_json_vec_test.go
index 9cddca85aa8da..e9c432e253fe7 100644
--- a/expression/builtin_json_vec_test.go
+++ b/expression/builtin_json_vec_test.go
@@ -38,10 +38,12 @@ var vecBuiltinJSONCases = map[string][]vecExprBenchCase{
 	ast.JSONSearch:       {},
 	ast.JSONReplace:      {},
 	ast.JSONDepth:        {{retEvalType: types.ETInt, childrenTypes: []types.EvalType{types.ETJson}}},
-	ast.JSONUnquote:      {},
-	ast.JSONRemove:       {},
-	ast.JSONMerge:        {},
-	ast.JSONInsert:       {},
+	ast.JSONUnquote: {
+		{retEvalType: types.ETString, childrenTypes: []types.EvalType{types.ETString}, geners: []dataGenerator{&jsonStringGener{}}},
+	},
+	ast.JSONRemove: {},
+	ast.JSONMerge:  {},
+	ast.JSONInsert: {},
 	ast.JSONQuote: {
 		{retEvalType: types.ETString, childrenTypes: []types.EvalType{types.ETJson}},
 	},