diff --git a/src/components/select/dropdown.vue b/src/components/select/dropdown.vue
index 50c674df..d54b1211 100644
--- a/src/components/select/dropdown.vue
+++ b/src/components/select/dropdown.vue
@@ -28,7 +28,7 @@
         computed: {
             styles () {
                 let style = {};
-                if (this.width) style.width = `${this.width}px`;
+                if (this.width) style.minWidth = `${this.width}px`;
                 return style;
             }
         },
diff --git a/src/components/select/select.vue b/src/components/select/select.vue
index e4f800b3..fb9fbd0d 100644
--- a/src/components/select/select.vue
+++ b/src/components/select/select.vue
@@ -201,9 +201,9 @@
             },
             placement: {
                 validator (value) {
-                    return oneOf(value, ['top', 'bottom']);
+                    return oneOf(value, ['top', 'bottom', 'top-start', 'bottom-start', 'top-end', 'bottom-end']);
                 },
-                default: 'bottom'
+                default: 'bottom-start'
             },
             transfer: {
                 type: Boolean,
diff --git a/src/styles/components/select.less b/src/styles/components/select.less
index 2b9f8517..9dad2ab7 100644
--- a/src/styles/components/select.less
+++ b/src/styles/components/select.less
@@ -235,6 +235,10 @@
         min-width: 100%;
         list-style: none;
     }
+
+    & &-dropdown{
+        width: auto;
+    }
 }
 
 .select-item(@select-prefix-cls, @select-item-prefix-cls);