diff --git a/docs/en/dpu_os/_toc.yaml b/docs/en/dpu_os/_toc.yaml
index 040400fa3b6582c8702736f8eb89a2664352edc5..1b94d5e64a3da940bb968dcfe811f6cb7a9171b1 100644
--- a/docs/en/dpu_os/_toc.yaml
+++ b/docs/en/dpu_os/_toc.yaml
@@ -1,11 +1,11 @@
-label: DPU_OS
+label: DPU-OS
 isManual: true
 href: ./overview.md
 description: This guide outlines the process of creating a DPU_OS image through openEuler OS customization, including deployment and validation procedures.
 sections:
-  - label: DPU_OS Background and Requirements
+  - label: DPU-OS Background and Requirements
     href: ./dpu_os_background_and_requirements.md
-  - label: DPU_OS Tailoring Guide
+  - label: DPU-OS Tailoring Guide
     href: ./dpu_os_tailoring_guide.md
   - label: Verification and Deployment
     href: ./verification_and_deployment.md