diff --git a/internal/errclass/classify_test.go b/internal/errclass/classify_test.go
index d4dff5809..2f8924e8d 100644
--- a/internal/errclass/classify_test.go
+++ b/internal/errclass/classify_test.go
@@ -113,6 +113,7 @@ func TestBuildAPIError_ExitCodeMatrix(t *testing.T) {
 		{"230027 user_not_authorized", 230027, errs.CategoryAuthorization, errs.SubtypeUserUnauthorized, 3, "PermissionError"},
 		{"1470403 task_permission_denied", 1470403, errs.CategoryAuthorization, errs.SubtypePermissionDenied, 3, "PermissionError"},
 		{"1470400 task_invalid_params", 1470400, errs.CategoryAPI, errs.SubtypeInvalidParameters, 1, "APIError"},
+		{"1062507 drive_parent_sibling_limit", 1062507, errs.CategoryAPI, errs.SubtypeQuotaExceeded, 1, "APIError"},
 		{"99991400 rate_limit", 99991400, errs.CategoryAPI, errs.SubtypeRateLimit, 1, "APIError"},
 		{"99991661 token_missing", 99991661, errs.CategoryAuthentication, errs.SubtypeTokenMissing, 3, "AuthenticationError"},
 		{"21000 challenge_required", 21000, errs.CategoryPolicy, errs.Subtype("challenge_required"), 6, "SecurityPolicyError"},
diff --git a/internal/errclass/codemeta_drive.go b/internal/errclass/codemeta_drive.go
index 113949b24..2a7e40d3d 100644
--- a/internal/errclass/codemeta_drive.go
+++ b/internal/errclass/codemeta_drive.go
@@ -17,6 +17,7 @@ var driveCodeMeta = map[int]CodeMeta{
 	1061043:   {Category: errs.CategoryAPI, Subtype: errs.SubtypeQuotaExceeded},                // file size beyond limit
 	1061044:   {Category: errs.CategoryAPI, Subtype: errs.SubtypeNotFound},                     // parent folder does not exist (upload)
 	1061101:   {Category: errs.CategoryAPI, Subtype: errs.SubtypeQuotaExceeded},                // file quota exceeded
+	1062507:   {Category: errs.CategoryAPI, Subtype: errs.SubtypeQuotaExceeded},                // parent folder child count limit exceeded
 	1062009:   {Category: errs.CategoryAPI, Subtype: errs.SubtypeInvalidParameters},            // actual size inconsistent with declared size
 	1063001:   {Category: errs.CategoryAPI, Subtype: errs.SubtypeInvalidParameters},            // secure label invalid parameter
 	1063002:   {Category: errs.CategoryAuthorization, Subtype: errs.SubtypePermissionDenied},   // secure label permission denied
diff --git a/shortcuts/drive/drive_push.go b/shortcuts/drive/drive_push.go
index bc5adfc4c..46050a924 100644
--- a/shortcuts/drive/drive_push.go
+++ b/shortcuts/drive/drive_push.go
@@ -623,6 +623,10 @@ func driveClassifyBatchFailure(err error) driveBatchFailureDecision {
 	case problem.Subtype == errs.SubtypeRateLimit || problem.Code == 99991400:
 		decision.Class = "rate_limited"
 		decision.Terminal = true
+	case problem.Code == 1062507:
+		decision.Class = "parent_sibling_limit"
+		decision.Terminal = true
+		decision.Hint = "The destination parent folder has reached its child-count limit. Clean up that folder, choose another --folder-token, or split the upload across subfolders before retrying."
 	case problem.Subtype == errs.SubtypeQuotaExceeded || problem.Code == 1061043:
 		decision.Class = "file_size_limit"
 	case problem.Code == 1062009:
diff --git a/shortcuts/drive/drive_push_test.go b/shortcuts/drive/drive_push_test.go
index 7bad05d0f..21c57e678 100644
--- a/shortcuts/drive/drive_push_test.go
+++ b/shortcuts/drive/drive_push_test.go
@@ -1334,6 +1334,75 @@ func TestDrivePushAbortsAfterCreateFolderMissingScope(t *testing.T) {
 	}
 }
 
+func TestDrivePushAbortsAfterCreateFolderParentSiblingLimit(t *testing.T) {
+	f, stdout, _, reg := cmdutil.TestFactory(t, driveTestConfig())
+
+	tmpDir := t.TempDir()
+	withDriveWorkingDir(t, tmpDir)
+	if err := os.MkdirAll(filepath.Join("local", "a"), 0o755); err != nil {
+		t.Fatalf("MkdirAll a: %v", err)
+	}
+	if err := os.MkdirAll(filepath.Join("local", "b"), 0o755); err != nil {
+		t.Fatalf("MkdirAll b: %v", err)
+	}
+
+	reg.Register(&httpmock.Stub{
+		Method: "GET",
+		URL:    "folder_token=folder_root",
+		Body: map[string]interface{}{
+			"code": 0, "msg": "ok",
+			"data": map[string]interface{}{"files": []interface{}{}, "has_more": false},
+		},
+	})
+	reg.Register(&httpmock.Stub{
+		Method: "POST",
+		URL:    "/open-apis/drive/v1/files/create_folder",
+		Body: map[string]interface{}{
+			"code": 1062507,
+			"msg":  "parent node out of sibling num.",
+		},
+	})
+
+	err := mountAndRunDrive(t, DrivePush, []string{
+		"+push",
+		"--local-dir", "local",
+		"--folder-token", "folder_root",
+		"--as", "bot",
+	}, f, stdout)
+	if err == nil {
+		t.Fatalf("expected partial failure, got nil\nstdout: %s", stdout.String())
+	}
+	var pfErr *output.PartialFailureError
+	if !errors.As(err, &pfErr) {
+		t.Fatalf("expected *output.PartialFailureError, got %T: %v", err, err)
+	}
+	summary, items := splitDrivePushStdout(t, stdout.Bytes())
+	if got := summary["failed"]; got != float64(1) {
+		t.Fatalf("summary.failed = %v, want 1", got)
+	}
+	if got := summary["aborted"]; got != true {
+		t.Fatalf("summary.aborted = %v, want true", got)
+	}
+	if len(items) != 1 {
+		t.Fatalf("items len = %d, want 1; items=%#v", len(items), items)
+	}
+	item := items[0]
+	if item["rel_path"] != "a" || item["phase"] != "create_folder" || item["error_class"] != "parent_sibling_limit" {
+		t.Fatalf("unexpected failed item: %#v", item)
+	}
+	if item["code"] != float64(1062507) || item["subtype"] != "quota_exceeded" || item["retryable"] != false {
+		t.Fatalf("unexpected failure metadata: %#v", item)
+	}
+	if got, _ := item["hint"].(string); !strings.Contains(got, "--folder-token") || !strings.Contains(got, "child-count limit") {
+		t.Fatalf("hint should explain the destination folder child-count limit, got item=%#v", item)
+	}
+	for _, item := range items {
+		if item["rel_path"] == "b" {
+			t.Fatalf("parent sibling limit must abort before b, got items=%#v", items)
+		}
+	}
+}
+
 func TestDrivePushDetectsLocalFileChangedBeforeUpload(t *testing.T) {
 	f, stdout, _, reg := cmdutil.TestFactory(t, driveTestConfig())
 
diff --git a/skills/lark-drive/references/lark-drive-push.md b/skills/lark-drive/references/lark-drive-push.md
index 0d7b881a7..c885146b8 100644
--- a/skills/lark-drive/references/lark-drive-push.md
+++ b/skills/lark-drive/references/lark-drive-push.md
@@ -143,6 +143,7 @@ lark-cli drive +push --local-dir ./repo --folder-token fldcnxxxxxxxxx \
 | `permission_denied` | `1061004` / HTTP 403 | 当前身份无权操作目标资源 | 停止重试，检查目标文件夹权限、身份类型（user / bot）和资源可见性 |
 | `invalid_api_parameters` | `1061002` | API 参数被服务端拒绝 | 停止重试，检查 `--folder-token`、覆盖模式、`file_token`、文件名和上传参数；不要对同一参数组合批量重试 |
 | `parent_node_missing` | `1061044` | 上传 / 建目录使用的父文件夹不存在或当前身份不可见 | 停止重试，检查 `--folder-token` 是否仍存在、是否有权限、父目录是否在 push 过程中被删除；不要继续上传同一目录树 |
+| `parent_sibling_limit` | `1062507` | 目标父文件夹单层子节点数量超过上限 | 停止重试，清理目标目录、换一个 `--folder-token`，或把上传内容拆到多个子目录 |
 | `rate_limited` | `99991400` | 触发频控 | 停止当前批次，退避后再重试 |
 | `server_error` | `1061001` / `2200` | Drive 服务端异常 | 停止当前批次，稍后重试；保留 `log_id` 便于排查 |