diff --git a/lib/utils/geo.d.ts b/lib/utils/geo.d.ts
index 8a5e7a6..9567e31 100644
--- a/lib/utils/geo.d.ts
+++ b/lib/utils/geo.d.ts
@@ -1,5 +1,5 @@
 /**
- * 计算地球上两点之间的球面距离
+ * 计算地球上两点之间的球面距离（单位：cm）
  */
 export declare function getDistanceBetweenPoints(lat1: number, lon1: number, lat2: number, lon2: number): number;
 /**
diff --git a/lib/utils/geo.js b/lib/utils/geo.js
index e4cbcc5..022e93d 100644
--- a/lib/utils/geo.js
+++ b/lib/utils/geo.js
@@ -2,7 +2,7 @@
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.gcj02towgs84 = exports.wgs84togcj02 = exports.gcj02tobd09 = exports.bd09togcj02 = exports.getDistanceBetweenPoints = void 0;
 /**
- * 计算地球上两点之间的球面距离
+ * 计算地球上两点之间的球面距离（单位：cm）
  */
 function getDistanceBetweenPoints(lat1, lon1, lat2, lon2) {
     // 转为弧度
diff --git a/src/utils/geo.ts b/src/utils/geo.ts
index 17ead86..b1552cc 100644
--- a/src/utils/geo.ts
+++ b/src/utils/geo.ts
@@ -1,5 +1,5 @@
 /**
- * 计算地球上两点之间的球面距离
+ * 计算地球上两点之间的球面距离（单位：cm）
  */
 export function getDistanceBetweenPoints(lat1: number, lon1: number, lat2: number, lon2: number) {
 	// 转为弧度