diff --git a/src/less/core/wrapper/flex.horizontal.less b/src/less/core/wrapper/flex.horizontal.less
index c47577689..1a3af4617 100644
--- a/src/less/core/wrapper/flex.horizontal.less
+++ b/src/less/core/wrapper/flex.horizontal.less
@@ -55,6 +55,7 @@
     -o-align-items: center;
     align-items: center;
   }
+
   &.v-bottom {
     /* 09版 */
     -webkit-box-align: flex-end;
@@ -66,6 +67,7 @@
     -o-align-items: flex-end;
     align-items: flex-end;
   }
+
   &.v-stretch {
     /* 09版 */
     -webkit-box-align: stretch;
@@ -78,6 +80,27 @@
     align-items: stretch;
   }
 
+  &.h-center {
+    /* 09版 */
+    -webkit-box-pack: center;
+    /* 12版 */
+    -webkit-justify-content: center;
+    -moz-justify-content: center;
+    -ms-justify-content: center;
+    -o-justify-content: center;
+    -ms-flex-pack: center;
+    justify-content: center;
+  }
+
+  &.h-right {
+    /* 12版 */
+    -webkit-flex-direction: row-reverse;
+    -moz-flex-direction: row-reverse;
+    -ms-flex-direction: row-reverse;
+    -o-flex-direction: row-reverse;
+    flex-direction: row-reverse;
+  }
+
   &.h-stretch {
     /* 09版 */
     -webkit-box-orient: vertical;
@@ -107,4 +130,4 @@
     -o-align-items: stretch;
     align-items: stretch;
   }
-}
\ No newline at end of file
+}
diff --git a/src/less/core/wrapper/flex.vertical.less b/src/less/core/wrapper/flex.vertical.less
index 2bbe8f7ff..4d1171267 100644
--- a/src/less/core/wrapper/flex.vertical.less
+++ b/src/less/core/wrapper/flex.vertical.less
@@ -55,6 +55,7 @@
     -o-align-items: center;
     align-items: center;
   }
+
   &.h-right {
     /* 09版 */
     -webkit-box-align: flex-end;
@@ -66,6 +67,7 @@
     -o-align-items: flex-end;
     align-items: flex-end;
   }
+
   &.h-stretch {
     /* 09版 */
     -webkit-box-align: stretch;
@@ -78,6 +80,27 @@
     align-items: stretch;
   }
 
+  &.v-middle {
+    /* 09版 */
+    -webkit-box-pack: center;
+    /* 12版 */
+    -webkit-justify-content: center;
+    -moz-justify-content: center;
+    -ms-justify-content: center;
+    -o-justify-content: center;
+    -ms-flex-pack: center;
+    justify-content: center;
+  }
+
+  &.v-bottom {
+    /* 12版 */
+    -webkit-flex-direction: column-reverse;
+    -moz-flex-direction: column-reverse;
+    -ms-flex-direction: column-reverse;
+    -o-flex-direction: column-reverse;
+    flex-direction: column-reverse;
+  }
+
   &.v-stretch {
     /* 09版 */
     -webkit-box-orient: horizontal;
@@ -107,4 +130,4 @@
     -o-align-items: stretch;
     align-items: stretch;
   }
-}
\ No newline at end of file
+}