diff --git a/models/repo.go b/models/repo.go
index 31d2f5f96..5b527e3cd 100755
--- a/models/repo.go
+++ b/models/repo.go
@@ -296,7 +296,6 @@ func (repo *Repository) ToCardFormat() *Repository4Card {
 }
 
 type ContributorInfo struct {
-	UserInfo      *User // nil for contributor who is not a registered user
 	RelAvatarLink string
 	UserName      string
 	Email         string
diff --git a/modules/redis/redis_key/repo_redis_key.go b/modules/redis/redis_key/repo_redis_key.go
new file mode 100644
index 000000000..b2b7ccd0a
--- /dev/null
+++ b/modules/redis/redis_key/repo_redis_key.go
@@ -0,0 +1,9 @@
+package redis_key
+
+import "fmt"
+
+const REPO_PREFIX = "repo"
+
+func RepoTopNContributors(repoId int64, N int) string {
+	return KeyJoin(REPO_PREFIX, fmt.Sprint(repoId), fmt.Sprint(N), "top_n_contributor")
+}
diff --git a/services/repository/contributor.go b/services/repository/contributor.go
index 896bc682d..817b4b086 100644
--- a/services/repository/contributor.go
+++ b/services/repository/contributor.go
@@ -3,14 +3,47 @@ package repository
 import (
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/redis/redis_client"
+	"code.gitea.io/gitea/modules/redis/redis_key"
+	"encoding/json"
+	"github.com/patrickmn/go-cache"
+	"time"
 )
 
+var repoContributorCache = cache.New(5*time.Minute, 1*time.Minute)
+
+type ContributorCacheVal struct {
+	Contributors []*models.ContributorInfo
+	Total        int
+}
+
 func GetRepoTopNContributors(repo *models.Repository, N int) ([]*models.ContributorInfo, int) {
-	var contributorInfos []*models.ContributorInfo
+	val, _ := redis_client.Get(redis_key.RepoTopNContributors(repo.ID, N))
+	if val != "" {
+		log.Debug("Get RepoTopNContributors from redis,repo.ID = %d value = %v", repo.ID, val)
+		temp := &ContributorCacheVal{}
+		json.Unmarshal([]byte(val), temp)
+		return temp.Contributors, temp.Total
+	}
+
+	contributorInfos, total := getRepoTopNContributorsFromDisk(repo, N)
+	log.Debug("Get RepoTopNContributors from disk,repo.ID = %d ", repo.ID)
+	jsonVal, err := json.Marshal(&ContributorCacheVal{Contributors: contributorInfos, Total: total})
+	if err == nil {
+		redis_client.Setex(redis_key.RepoTopNContributors(repo.ID, N), string(jsonVal), 5*time.Minute)
+	}
+	return contributorInfos, total
+}
+
+func getRepoTopNContributorsFromDisk(repo *models.Repository, N int) ([]*models.ContributorInfo, int) {
+	contributorInfos := make([]*models.ContributorInfo, 0)
+
 	branchName := GetDefaultBranchName(repo)
 	if branchName == "" {
 		return contributorInfos, 0
 	}
+
 	contributors, err := git.GetContributors(repo.RepoPath(), branchName)
 	if err == nil && contributors != nil {
 		contributorInfoHash := make(map[string]*models.ContributorInfo)
@@ -31,7 +64,7 @@ func GetRepoTopNContributors(repo *models.Repository, N int) ([]*models.Contribu
 				} else {
 					// new committer info
 					var newContributor = &models.ContributorInfo{
-						user, user.RelAvatarLink(), user.Name, user.Email, c.CommitCnt,
+						user.RelAvatarLink(), user.Name, user.Email, c.CommitCnt,
 					}
 					contributorInfos = append(contributorInfos, newContributor)
 					contributorInfoHash[user.Email] = newContributor
@@ -43,7 +76,7 @@ func GetRepoTopNContributors(repo *models.Repository, N int) ([]*models.Contribu
 					existedContributorInfo.CommitCnt += c.CommitCnt
 				} else {
 					var newContributor = &models.ContributorInfo{
-						user, "", "", c.Email, c.CommitCnt,
+						"", "", c.Email, c.CommitCnt,
 					}
 					contributorInfos = append(contributorInfos, newContributor)
 					contributorInfoHash[c.Email] = newContributor