diff --git a/components/date-picker/style/index.less b/components/date-picker/style/index.less
index e0363796f6..4550d4d0c2 100644
--- a/components/date-picker/style/index.less
+++ b/components/date-picker/style/index.less
@@ -235,20 +235,11 @@
     //   display: none !important;
     // }
 
-    &::before,
     &::after {
       position: absolute;
       content: '';
     }
 
-    &::before {
-      top: 0;
-      right: 0;
-      width: @arrow-size;
-      height: @arrow-size;
-      border: @arrow-size / 2 solid @border-color-split;
-      border-color: @border-color-split @border-color-split transparent transparent;
-    }
     &::after {
       top: @border-width-base;
       right: @border-width-base;
diff --git a/components/style/themes/dark.less b/components/style/themes/dark.less
index 1e0419f14b..cf7d774f36 100644
--- a/components/style/themes/dark.less
+++ b/components/style/themes/dark.less
@@ -323,6 +323,7 @@
 @picker-basic-cell-disabled-bg: #303030;
 @picker-border-color: @border-color-split;
 @picker-bg: transparent;
+@picker-date-hover-range-border-color: darken(@primary-color, 20%);
 
 // Dropdown
 // ---