diff --git a/src/less/image.less b/src/less/image.less
index 9fd6c1c35..35dba5f3a 100644
--- a/src/less/image.less
+++ b/src/less/image.less
@@ -315,7 +315,7 @@
 @color-bi-font-active: #3f8ce8;
 
 // 默认font
-.font(@class,@content, @color: @color-bi-font-native, @fontSize: 16px) {
+.font(@class,@content, @color: @color-bi-font-native, @fontSize: @font-size-16) {
   @fc: "\@{content}";
   .@{class} {
     & .b-font {
@@ -334,7 +334,7 @@
 }
 
 // 有悬浮效果的font
-.font-hover(@class,@content,@color-native: @color-bi-font-native, @color-hover: @color-bi-font-hover, @fontSize: 16px) {
+.font-hover(@class,@content,@color-native: @color-bi-font-native, @color-hover: @color-bi-font-hover, @fontSize: @font-size-16) {
   @fc: "\@{content}";
   .@{class} {
     & .b-font {
@@ -358,7 +358,7 @@
 }
 
 // 有默认、激活(选中)的font
-.font-hover-active(@class,@content,@color-native: @color-bi-font-native, @color-hover: @color-bi-font-hover, @color-active: @color-bi-font-active, @fontSize: 16px) {
+.font-hover-active(@class,@content,@color-native: @color-bi-font-native, @color-hover: @color-bi-font-hover, @color-active: @color-bi-font-active, @fontSize: @font-size-16) {
   @fc: "\@{content}";
   .@{class} {
     & .b-font {
@@ -387,7 +387,7 @@
   }
 }
 
-.font-effect(@class,@content,@color-native: @color-bi-font-native, @color-hover: @color-bi-font-hover, @color-active: @color-bi-font-active, @color-selected: @color-bi-font-active, @fontSize: 16px) {
+.font-effect(@class,@content,@color-native: @color-bi-font-native, @color-hover: @color-bi-font-hover, @color-active: @color-bi-font-active, @color-selected: @color-bi-font-active, @fontSize: @font-size-16) {
   @fc: "\@{content}";
   .@{class} {
     & .b-font {
diff --git a/src/less/lib/constant.less b/src/less/lib/constant.less
index be49d9795..fa137c19e 100644
--- a/src/less/lib/constant.less
+++ b/src/less/lib/constant.less
@@ -8,6 +8,7 @@
 @font-size-14: 14px;
 @font-size-16: 16px;
 @font-size-22: 22px;
+@font-size-70: 70px;
 @radius-2: 2px;
 @radius-6: 6px;