diff --git a/src/components/button/button-group.vue b/src/components/button/button-group.vue
index a3634264..55f72ff2 100644
--- a/src/components/button/button-group.vue
+++ b/src/components/button/button-group.vue
@@ -13,7 +13,7 @@
         props: {
             size: {
                 validator (value) {
-                    return oneOf(value, ['small', 'large']);
+                    return oneOf(value, ['small', 'large', 'default']);
                 }
             },
             shape: {
diff --git a/src/components/date-picker/picker.vue b/src/components/date-picker/picker.vue
index c9ccce3b..3fafbec2 100644
--- a/src/components/date-picker/picker.vue
+++ b/src/components/date-picker/picker.vue
@@ -178,7 +178,7 @@
             },
             size: {
                 validator (value) {
-                    return oneOf(value, ['small', 'large']);
+                    return oneOf(value, ['small', 'large', 'default']);
                 }
             },
             placeholder: {
diff --git a/src/components/input-number/input-number.vue b/src/components/input-number/input-number.vue
index af24ff1c..6d9641e8 100644
--- a/src/components/input-number/input-number.vue
+++ b/src/components/input-number/input-number.vue
@@ -85,7 +85,7 @@
             },
             size: {
                 validator (value) {
-                    return oneOf(value, ['small', 'large']);
+                    return oneOf(value, ['small', 'large', 'default']);
                 }
             },
             disabled: {
diff --git a/src/components/switch/switch.vue b/src/components/switch/switch.vue
index 58a28bd4..3ea67a15 100644
--- a/src/components/switch/switch.vue
+++ b/src/components/switch/switch.vue
@@ -26,7 +26,7 @@
             },
             size: {
                 validator (value) {
-                    return oneOf(value, ['large', 'small']);
+                    return oneOf(value, ['large', 'small', 'default']);
                 }
             }
         },