diff --git a/README.md b/README.md
index ec15d57..19e303b 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,8 @@
 # sskj — 多平台大模型推理性能基准测试项目
 
+> **更新（2026-07-20 17:55:20 +0800）**
+> - H20 SGLang TPxDP matrix 默认传入 `--cuda-graph-max-bs-decode 128`，使高并发 decode 在 batch 不超过 128 时持续使用 CUDA Graph；Docker 与 native 启动入口均已覆盖。
+
 > **更新（2026-07-20 17:25:40 +0800）**
 > - RTX 6000D 的 SGLang DSV4-Flash 默认传入 `--cuda-graph-max-bs-decode 16`，避免 SM120 sparse MLA 在大 batch CUDA Graph 预捕获时 OOM。该参数仅限制预捕获图的 decode batch 上限，不限制服务的 `max-running-requests` 或 benchmark 并发；其他平台默认不受影响。
 > - H20、RTX 6000D、P800 的配置不再硬编码 sskj 仓库绝对路径：仓库内的环境、数据集、缓存和 P800 patch 均通过共享的 `${ROOT_DIR}` 推导，仓库迁移后无需逐个修改路径。
diff --git a/experiments/h20/dsv4_h20_sglang_tp_dp_matrix/config.env b/experiments/h20/dsv4_h20_sglang_tp_dp_matrix/config.env
index 366fcee..ec19aff 100644
--- a/experiments/h20/dsv4_h20_sglang_tp_dp_matrix/config.env
+++ b/experiments/h20/dsv4_h20_sglang_tp_dp_matrix/config.env
@@ -36,6 +36,8 @@ declare -a PARALLEL_CONFIGS=(
 # Context length and scheduler capacity use SGLang's model/default settings.
 MEM_FRACTION_STATIC="${MEM_FRACTION_STATIC:-0.88}"
 MOE_RUNNER_BACKEND="${MOE_RUNNER_BACKEND:-marlin}"
+# Keep high-concurrency decode on captured CUDA Graphs on H20.
+CUDA_GRAPH_MAX_BS_DECODE="${CUDA_GRAPH_MAX_BS_DECODE:-128}"
 
 # Deployment switch. 0 = native sglang venv, 1 = Docker.
 USE_DOCKER="${USE_DOCKER:-1}"
diff --git a/experiments/h20/dsv4_h20_sglang_tp_dp_matrix/start_sglang_docker.sh b/experiments/h20/dsv4_h20_sglang_tp_dp_matrix/start_sglang_docker.sh
index 4fce532..3b65d8c 100755
--- a/experiments/h20/dsv4_h20_sglang_tp_dp_matrix/start_sglang_docker.sh
+++ b/experiments/h20/dsv4_h20_sglang_tp_dp_matrix/start_sglang_docker.sh
@@ -44,6 +44,10 @@ if [[ "$DP" -gt 1 ]]; then
   )
 fi
 
+if [[ -n "${CUDA_GRAPH_MAX_BS_DECODE:-}" ]]; then
+  SERVER_ARGS+=(--cuda-graph-max-bs-decode "$CUDA_GRAPH_MAX_BS_DECODE")
+fi
+
 SERVER_ARGS_STR="${SERVER_ARGS[*]}"
 
 echo "=== Starting SGLang server in Docker (TP=${TP}, DP=${DP}) ==="
diff --git a/experiments/h20/dsv4_h20_sglang_tp_dp_matrix/start_sglang_dp.sh b/experiments/h20/dsv4_h20_sglang_tp_dp_matrix/start_sglang_dp.sh
index 3fc17ea..1425f48 100755
--- a/experiments/h20/dsv4_h20_sglang_tp_dp_matrix/start_sglang_dp.sh
+++ b/experiments/h20/dsv4_h20_sglang_tp_dp_matrix/start_sglang_dp.sh
@@ -49,6 +49,10 @@ if [[ "$DP" -gt 1 ]]; then
   )
 fi
 
+if [[ -n "${CUDA_GRAPH_MAX_BS_DECODE:-}" ]]; then
+  SERVER_ARGS+=(--cuda-graph-max-bs-decode "$CUDA_GRAPH_MAX_BS_DECODE")
+fi
+
 SERVER_ARGS_STR="${SERVER_ARGS[*]}"
 
 echo "=== Starting SGLang server (TP=${TP}, DP=${DP}) ==="