diff --git a/src/css/base/combo/combo.bubble.css b/src/css/base/combo/combo.bubble.css
new file mode 100644
index 000000000..0c7ee8d0e
--- /dev/null
+++ b/src/css/base/combo/combo.bubble.css
@@ -0,0 +1,31 @@
+/****添加计算宽度的--运算符直接需要space****/
+/****** common color(常用颜色,可用于普遍场景) *****/
+/**** custom color(自定义颜色,用于特定场景) ****/
+.bi-bubble-combo .bubble-combo-triangle-left {
+  width: 0;
+  height: 0;
+  border-top: 6px solid transparent;
+  border-left: 6px solid #009de3;
+  border-bottom: 6px solid transparent;
+}
+.bi-bubble-combo .bubble-combo-triangle-right {
+  width: 0;
+  height: 0;
+  border-top: 6px solid transparent;
+  border-right: 6px solid #009de3;
+  border-bottom: 6px solid transparent;
+}
+.bi-bubble-combo .bubble-combo-triangle-top {
+  width: 0;
+  height: 0;
+  border-left: 6px solid transparent;
+  border-right: 6px solid transparent;
+  border-top: 6px solid #009de3;
+}
+.bi-bubble-combo .bubble-combo-triangle-bottom {
+  width: 0;
+  height: 0;
+  border-left: 6px solid transparent;
+  border-right: 6px solid transparent;
+  border-bottom: 6px solid #009de3;
+}