diff --git a/CHANGELOG.md b/CHANGELOG.md
index 40a2c034324..e5018c98b63 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -51,6 +51,7 @@ Docs: https://docs.openclaw.ai
 - Slack/interactive replies: drop overlong Block Kit button URLs while preserving valid callback values, so malformed link buttons no longer make Slack reject the whole interactive reply. Thanks @slackapi.
 - Slack/commands: truncate native command argument-menu confirmation text to Slack's dialog limit, so long plugin arg names no longer make fallback buttons render invalid Block Kit payloads. Thanks @slackapi.
 - Slack/exec approvals: cap native approval metadata context to Slack's element and text limits, so large approval details no longer make Slack reject the approval card. Thanks @slackapi.
+- Slack/commands: cap native command argument-menu fallback rows to Slack's message block limit, so large plugin choice lists no longer make Slack reject the generated menu. Thanks @slackapi.
 - Channels/WhatsApp: require Baileys outbound message ids before marking auto-replies delivered, so transcript text and ack reactions no longer make failed group replies look sent. Fixes #49225. Thanks @TinyTb.
 - CLI/update: scope packaged Node compile caches by OpenClaw version and install metadata, so global installs no longer reuse stale compiled chunks after package updates. Thanks @pashpashpash.
 - Channels/Voice call: keep pre-auth webhook in-flight limiting active when socket remote address metadata is missing, so slow-body requests from stripped-IP proxy paths still share the fallback bucket. (#74453) Thanks @davidangularme.
diff --git a/extensions/slack/src/monitor/slash.test.ts b/extensions/slack/src/monitor/slash.test.ts
index 4c851bfe670..0bbb5e7a594 100644
--- a/extensions/slack/src/monitor/slash.test.ts
+++ b/extensions/slack/src/monitor/slash.test.ts
@@ -8,6 +8,7 @@ vi.mock("./slash-commands.runtime.js", () => {
   const reportExternalCommand = { key: "reportexternal", nativeName: "reportexternal" };
   const reportLongCommand = { key: "reportlong", nativeName: "reportlong" };
   const reportLongButtonCommand = { key: "reportlongbutton", nativeName: "reportlongbutton" };
+  const reportHugeButtonCommand = { key: "reporthugebutton", nativeName: "reporthugebutton" };
   const unsafeConfirmCommand = { key: "unsafeconfirm", nativeName: "unsafeconfirm" };
   const longConfirmCommand = { key: "longconfirm", nativeName: "longconfirm" };
   const statusAliasCommand = { key: "status", nativeName: "status" };
@@ -76,6 +77,9 @@ vi.mock("./slash-commands.runtime.js", () => {
       if (normalized === "reportlongbutton") {
         return reportLongButtonCommand;
       }
+      if (normalized === "reporthugebutton") {
+        return reportHugeButtonCommand;
+      }
       if (normalized === "unsafeconfirm") {
         return unsafeConfirmCommand;
       }
@@ -124,6 +128,12 @@ vi.mock("./slash-commands.runtime.js", () => {
         acceptsArgs: true,
         args: [],
       },
+      {
+        name: "reporthugebutton",
+        description: "ReportHugeButton",
+        acceptsArgs: true,
+        args: [],
+      },
       {
         name: "unsafeconfirm",
         description: "UnsafeConfirm",
@@ -168,6 +178,15 @@ vi.mock("./slash-commands.runtime.js", () => {
           },
         ]);
       }
+      if (params.command?.key === "reporthugebutton") {
+        return resolvePeriodMenu(
+          params,
+          Array.from({ length: 250 }, (_v, i) => ({
+            value: `${String(i + 1)}-${"x".repeat(170)}`,
+            label: `Long button label ${i + 1}`,
+          })),
+        );
+      }
       if (params.command?.key === "reportcompact") {
         return resolvePeriodMenu(params, baseReportPeriodChoices);
       }
@@ -446,6 +465,7 @@ describe("Slack native command argument menus", () => {
   let reportExternalHandler: (args: unknown) => Promise<void>;
   let reportLongHandler: (args: unknown) => Promise<void>;
   let reportLongButtonHandler: (args: unknown) => Promise<void>;
+  let reportHugeButtonHandler: (args: unknown) => Promise<void>;
   let unsafeConfirmHandler: (args: unknown) => Promise<void>;
   let longConfirmHandler: (args: unknown) => Promise<void>;
   let agentStatusHandler: (args: unknown) => Promise<void>;
@@ -465,6 +485,11 @@ describe("Slack native command argument menus", () => {
       "/reportlongbutton",
       "/reportlongbutton",
     );
+    reportHugeButtonHandler = requireHandler(
+      harness.commands,
+      "/reporthugebutton",
+      "/reporthugebutton",
+    );
     unsafeConfirmHandler = requireHandler(harness.commands, "/unsafeconfirm", "/unsafeconfirm");
     longConfirmHandler = requireHandler(harness.commands, "/longconfirm", "/longconfirm");
     agentStatusHandler = requireHandler(harness.commands, "/agentstatus", "/agentstatus");
@@ -601,6 +626,18 @@ describe("Slack native command argument menus", () => {
     expect(firstElement?.confirm).toBeTruthy();
   });
 
+  it("caps large button fallback menus to Slack's block limit", async () => {
+    const { respond } = await runCommandHandler(reportHugeButtonHandler);
+    expect(respond).toHaveBeenCalledTimes(1);
+    const payload = respond.mock.calls[0]?.[0] as {
+      blocks?: Array<{ type: string; elements?: unknown[] }>;
+    };
+    const actionBlocks = (payload.blocks ?? []).filter((block) => block.type === "actions");
+    expect(payload.blocks).toHaveLength(50);
+    expect(actionBlocks).toHaveLength(47);
+    expect(actionBlocks.at(-1)?.elements).toHaveLength(5);
+  });
+
   it("shows an overflow menu when choices fit compact range", async () => {
     const element = await getFirstActionElementFromCommand(reportCompactHandler);
     expect(element?.type).toBe("overflow");
diff --git a/extensions/slack/src/monitor/slash.ts b/extensions/slack/src/monitor/slash.ts
index b551bd1f85a..9e002b38206 100644
--- a/extensions/slack/src/monitor/slash.ts
+++ b/extensions/slack/src/monitor/slash.ts
@@ -26,6 +26,7 @@ import {
   normalizeOptionalString,
 } from "openclaw/plugin-sdk/text-runtime";
 import type { ResolvedSlackAccount } from "../accounts.js";
+import { SLACK_MAX_BLOCKS } from "../blocks-input.js";
 import { truncateSlackText } from "../truncate.js";
 import { resolveSlackAllowListMatch, resolveSlackUserAllowed } from "./allow-list.js";
 import { resolveSlackEffectiveAllowFrom } from "./auth.js";
@@ -57,6 +58,8 @@ const SLACK_COMMAND_ARG_SELECT_OPTION_VALUE_MAX = 75;
 const SLACK_COMMAND_ARG_BUTTON_TEXT_MAX = 75;
 const SLACK_COMMAND_ARG_CONFIRM_TEXT_MAX = 300;
 const SLACK_HEADER_TEXT_MAX = 150;
+const SLACK_COMMAND_ARG_CHROME_BLOCKS = 3;
+const SLACK_COMMAND_ARG_ACTION_BLOCKS_MAX = SLACK_MAX_BLOCKS - SLACK_COMMAND_ARG_CHROME_BLOCKS;
 let slashCommandsRuntimePromise: Promise<typeof import("./slash-commands.runtime.js")> | null =
   null;
 let slashDispatchRuntimePromise: Promise<typeof import("./slash-dispatch.runtime.js")> | null =
@@ -338,6 +341,7 @@ function buildSlackCommandArgMenuBlocks(params: {
     `Select one option to continue /${params.command} (${params.arg})`,
     3000,
   );
+  const visibleRows = rows.slice(0, SLACK_COMMAND_ARG_ACTION_BLOCKS_MAX);
   return [
     {
       type: "header",
@@ -351,7 +355,7 @@ function buildSlackCommandArgMenuBlocks(params: {
       type: "context",
       elements: [{ type: "mrkdwn", text: contextText }],
     },
-    ...rows,
+    ...visibleRows,
   ];
 }