diff --git a/routers/api/actions/artifacts.go b/routers/api/actions/artifacts.go
index 5bfcc9dfc..0d2062ad0 100644
--- a/routers/api/actions/artifacts.go
+++ b/routers/api/actions/artifacts.go
@@ -257,8 +257,11 @@ func (ar artifactRoutes) uploadArtifact(ctx *ArtifactContext) {
 		return
 	}
 
-	// update artifact size if zero
-	if artifact.FileSize == 0 || artifact.FileCompressedSize == 0 {
+	// update artifact size if zero or not match, over write artifact size
+	if artifact.FileSize == 0 ||
+		artifact.FileCompressedSize == 0 ||
+		artifact.FileSize != fileRealTotalSize ||
+		artifact.FileCompressedSize != chunksTotalSize {
 		artifact.FileSize = fileRealTotalSize
 		artifact.FileCompressedSize = chunksTotalSize
 		artifact.ContentEncoding = ctx.Req.Header.Get("Content-Encoding")
@@ -267,6 +270,8 @@ func (ar artifactRoutes) uploadArtifact(ctx *ArtifactContext) {
 			ctx.Error(http.StatusInternalServerError, "Error update artifact")
 			return
 		}
+		log.Debug("[artifact] update artifact size, artifact_id: %d, size: %d, compressed size: %d",
+			artifact.ID, artifact.FileSize, artifact.FileCompressedSize)
 	}
 
 	ctx.JSON(http.StatusOK, map[string]string{
diff --git a/routers/api/actions/artifacts_chunks.go b/routers/api/actions/artifacts_chunks.go
index 36432a0ca..0713c8bba 100644
--- a/routers/api/actions/artifacts_chunks.go
+++ b/routers/api/actions/artifacts_chunks.go
@@ -186,7 +186,14 @@ func mergeChunksForArtifact(ctx *ArtifactContext, chunks []*chunkFileItem, st st
 	}()
 
 	// save storage path to artifact
-	log.Debug("[artifact] merge chunks to artifact: %d, %s", artifact.ID, storagePath)
+	log.Debug("[artifact] merge chunks to artifact: %d, %s, old:%s", artifact.ID, storagePath, artifact.StoragePath)
+	// if artifact is already uploaded, delete the old file
+	if artifact.StoragePath != "" {
+		if err := st.Delete(artifact.StoragePath); err != nil {
+			log.Warn("Error deleting old artifact: %s, %v", artifact.StoragePath, err)
+		}
+	}
+
 	artifact.StoragePath = storagePath
 	artifact.Status = int64(actions.ArtifactStatusUploadConfirmed)
 	if err := actions.UpdateArtifactByID(ctx, artifact.ID, artifact); err != nil {
diff --git a/tests/integration/api_actions_artifact_test.go b/tests/integration/api_actions_artifact_test.go
index 2597d1037..ce2d14cc0 100644
--- a/tests/integration/api_actions_artifact_test.go
+++ b/tests/integration/api_actions_artifact_test.go
@@ -287,3 +287,92 @@ func TestActionsArtifactUploadWithRetentionDays(t *testing.T) {
 		AddTokenAuth("8061e833a55f6fc0157c98b883e91fcfeeb1a71a")
 	MakeRequest(t, req, http.StatusOK)
 }
+
+func TestActionsArtifactOverwrite(t *testing.T) {
+	defer tests.PrepareTestEnv(t)()
+
+	{
+		// download old artifact uploaded by tests above, it should 1024 A
+		req := NewRequest(t, "GET", "/api/actions_pipeline/_apis/pipelines/workflows/791/artifacts").
+			AddTokenAuth("8061e833a55f6fc0157c98b883e91fcfeeb1a71a")
+		resp := MakeRequest(t, req, http.StatusOK)
+		var listResp listArtifactsResponse
+		DecodeJSON(t, resp, &listResp)
+
+		idx := strings.Index(listResp.Value[0].FileContainerResourceURL, "/api/actions_pipeline/_apis/pipelines/")
+		url := listResp.Value[0].FileContainerResourceURL[idx+1:] + "?itemPath=artifact"
+		req = NewRequest(t, "GET", url).
+			AddTokenAuth("8061e833a55f6fc0157c98b883e91fcfeeb1a71a")
+		resp = MakeRequest(t, req, http.StatusOK)
+		var downloadResp downloadArtifactResponse
+		DecodeJSON(t, resp, &downloadResp)
+
+		idx = strings.Index(downloadResp.Value[0].ContentLocation, "/api/actions_pipeline/_apis/pipelines/")
+		url = downloadResp.Value[0].ContentLocation[idx:]
+		req = NewRequest(t, "GET", url).
+			AddTokenAuth("8061e833a55f6fc0157c98b883e91fcfeeb1a71a")
+		resp = MakeRequest(t, req, http.StatusOK)
+		body := strings.Repeat("A", 1024)
+		assert.Equal(t, resp.Body.String(), body)
+	}
+
+	{
+		// upload same artifact, it uses 4096 B
+		req := NewRequestWithJSON(t, "POST", "/api/actions_pipeline/_apis/pipelines/workflows/791/artifacts", getUploadArtifactRequest{
+			Type: "actions_storage",
+			Name: "artifact",
+		}).AddTokenAuth("8061e833a55f6fc0157c98b883e91fcfeeb1a71a")
+		resp := MakeRequest(t, req, http.StatusOK)
+		var uploadResp uploadArtifactResponse
+		DecodeJSON(t, resp, &uploadResp)
+
+		idx := strings.Index(uploadResp.FileContainerResourceURL, "/api/actions_pipeline/_apis/pipelines/")
+		url := uploadResp.FileContainerResourceURL[idx:] + "?itemPath=artifact/abc.txt"
+		body := strings.Repeat("B", 4096)
+		req = NewRequestWithBody(t, "PUT", url, strings.NewReader(body)).
+			AddTokenAuth("8061e833a55f6fc0157c98b883e91fcfeeb1a71a").
+			SetHeader("Content-Range", "bytes 0-4095/4096").
+			SetHeader("x-tfs-filelength", "4096").
+			SetHeader("x-actions-results-md5", "wUypcJFeZCK5T6r4lfqzqg==") // base64(md5(body))
+		MakeRequest(t, req, http.StatusOK)
+
+		// confirm artifact upload
+		req = NewRequest(t, "PATCH", "/api/actions_pipeline/_apis/pipelines/workflows/791/artifacts?artifactName=artifact").
+			AddTokenAuth("8061e833a55f6fc0157c98b883e91fcfeeb1a71a")
+		MakeRequest(t, req, http.StatusOK)
+	}
+
+	{
+		// download artifact again, it should 4096 B
+		req := NewRequest(t, "GET", "/api/actions_pipeline/_apis/pipelines/workflows/791/artifacts").
+			AddTokenAuth("8061e833a55f6fc0157c98b883e91fcfeeb1a71a")
+		resp := MakeRequest(t, req, http.StatusOK)
+		var listResp listArtifactsResponse
+		DecodeJSON(t, resp, &listResp)
+
+		var uploadedItem listArtifactsResponseItem
+		for _, item := range listResp.Value {
+			if item.Name == "artifact" {
+				uploadedItem = item
+				break
+			}
+		}
+		assert.Equal(t, uploadedItem.Name, "artifact")
+
+		idx := strings.Index(uploadedItem.FileContainerResourceURL, "/api/actions_pipeline/_apis/pipelines/")
+		url := uploadedItem.FileContainerResourceURL[idx+1:] + "?itemPath=artifact"
+		req = NewRequest(t, "GET", url).
+			AddTokenAuth("8061e833a55f6fc0157c98b883e91fcfeeb1a71a")
+		resp = MakeRequest(t, req, http.StatusOK)
+		var downloadResp downloadArtifactResponse
+		DecodeJSON(t, resp, &downloadResp)
+
+		idx = strings.Index(downloadResp.Value[0].ContentLocation, "/api/actions_pipeline/_apis/pipelines/")
+		url = downloadResp.Value[0].ContentLocation[idx:]
+		req = NewRequest(t, "GET", url).
+			AddTokenAuth("8061e833a55f6fc0157c98b883e91fcfeeb1a71a")
+		resp = MakeRequest(t, req, http.StatusOK)
+		body := strings.Repeat("B", 4096)
+		assert.Equal(t, resp.Body.String(), body)
+	}
+}