diff --git a/game-server/app/services/expeditionService.ts b/game-server/app/services/expeditionService.ts
index 9d11efca4..a486f8e16 100644
--- a/game-server/app/services/expeditionService.ts
+++ b/game-server/app/services/expeditionService.ts
@@ -135,8 +135,7 @@ export async function matchPlayers(roleId: string, scale: number, range: number,
     let resultRange = await RoleModel.findByCeScale(min, max);
     resultRange = resultRange.filter(cur => cur.roleId != roleId);
     if(resultRange.length > 0) {
-        let index = Math.floor(Math.random() * resultRange.length);
-        let role = resultRange[index];
+        let role = resultRange[0];
         let {roleId, topLineup, topLineupCe } = role;
         let attrByHid = await getHeroesAttributes(roleId);
 
diff --git a/shared/db/Role.ts b/shared/db/Role.ts
index 92eae1151..d077a35b6 100644
--- a/shared/db/Role.ts
+++ b/shared/db/Role.ts
@@ -109,6 +109,7 @@ export class Teraph {
 @index({ roleName: 1 })
 @index({ serverId: 1, roleId: 1 })
 @index({ towerLv: -1, towerUpTime: 1 })
+@index({ topLineupCe: 1, updatedAt: 1 })
 @index({ ce: -1 })
 // @index({ userInfo.uid: 1, serverId: 1 })
 export default class Role extends BaseModel {
@@ -752,7 +753,7 @@ export default class Role extends BaseModel {
     public static async findByCeScale(min: number, max: number) {
         const result: RoleType[] = await RoleModel.find({ topLineupCe: { $lte: max, $gte: min } })
         .populate('topLineup.hero')
-        .sort({ updatedAt: -1 }).limit(100).lean({ getters: true, virtuals: true });
+        .sort({ topLineupCe: 1, updatedAt: 1 }).limit(10).lean({ getters: true, virtuals: true });
         return result;
     }