diff --git a/packages/i18n/src/locales/en/settings.yaml b/packages/i18n/src/locales/en/settings.yaml
index 4577cac51..89c5e6817 100644
--- a/packages/i18n/src/locales/en/settings.yaml
+++ b/packages/i18n/src/locales/en/settings.yaml
@@ -1245,6 +1245,10 @@ pages:
             nano_banana: Nano Banana (Gemini 2.5 Flash Image)
       deepseek:
         description: deepseek.com
+        fields:
+          field:
+            thinking-mode:
+              description: Controls whether DeepSeek reasoning models use thinking in chat requests.
         title: DeepSeek
       elevenlabs:
         description: elevenlabs.io
diff --git a/packages/i18n/src/locales/zh-Hans/settings.yaml b/packages/i18n/src/locales/zh-Hans/settings.yaml
index 680321bd8..f00bd07ba 100644
--- a/packages/i18n/src/locales/zh-Hans/settings.yaml
+++ b/packages/i18n/src/locales/zh-Hans/settings.yaml
@@ -1191,6 +1191,10 @@ pages:
             nano_banana: Nano Banana（Gemini 2.5 Flash Image）
       deepseek:
         description: DeepSeek.com
+        fields:
+          field:
+            thinking-mode:
+              description: 控制 DeepSeek 推理模型是否在聊天请求中启用深度思考。
         title: 深度求索 DeepSeek
       elevenlabs:
         description: Elevenlabs.io
diff --git a/packages/stage-pages/src/pages/settings/providers/chat/[providerId].vue b/packages/stage-pages/src/pages/settings/providers/chat/[providerId].vue
index 3802d2b61..271b3478b 100644
--- a/packages/stage-pages/src/pages/settings/providers/chat/[providerId].vue
+++ b/packages/stage-pages/src/pages/settings/providers/chat/[providerId].vue
@@ -14,6 +14,7 @@ import { useProviderValidation } from '@proj-airi/stage-ui/composables/use-provi
 import { getDefinedProvider } from '@proj-airi/stage-ui/libs'
 import { useConsciousnessStore } from '@proj-airi/stage-ui/stores/modules/consciousness'
 import { useProviderConfigStore } from '@proj-airi/stage-ui/stores/providers/config'
+import { FieldCombobox } from '@proj-airi/ui'
 import { storeToRefs } from 'pinia'
 import { computed } from 'vue'
 import { useRoute } from 'vue-router'
@@ -44,6 +45,17 @@ const baseUrl = computed({
   },
 })
 
+const thinkingMode = computed({
+  get: () => providers.value[providerId]?.thinkingMode || 'auto',
+  set: (value) => {
+    if (!providers.value[providerId])
+      providers.value[providerId] = {}
+    providers.value[providerId].thinkingMode = value
+  },
+})
+
+const supportsDeepSeekThinkingMode = computed(() => providerId === 'deepseek')
+
 // Use the composable to get validation logic and state
 const {
   t,
@@ -107,6 +119,18 @@ function goToModelSelection() {
           v-model="baseUrl"
           :placeholder="providerMetadata?.defaultConfig.baseUrl as string || 'Base URL of your provider'"
         />
+
+        <FieldCombobox
+          v-if="supportsDeepSeekThinkingMode"
+          v-model="thinkingMode"
+          :label="t('settings.pages.providers.catalog.edit.config.common.fields.field.thinking-mode.label')"
+          :description="t('settings.pages.providers.provider.deepseek.fields.field.thinking-mode.description')"
+          :options="[
+            { label: t('settings.pages.providers.catalog.edit.config.common.fields.field.thinking-mode.options.auto'), value: 'auto' },
+            { label: t('settings.pages.providers.catalog.edit.config.common.fields.field.thinking-mode.options.disable'), value: 'disable' },
+            { label: t('settings.pages.providers.catalog.edit.config.common.fields.field.thinking-mode.options.enable'), value: 'enable' },
+          ]"
+        />
       </ProviderAdvancedSettings>
 
       <ProviderValidationAlerts
diff --git a/packages/stage-ui/src/libs/providers/providers/deepseek/index.test.ts b/packages/stage-ui/src/libs/providers/providers/deepseek/index.test.ts
new file mode 100644
index 000000000..33d56494e
--- /dev/null
+++ b/packages/stage-ui/src/libs/providers/providers/deepseek/index.test.ts
@@ -0,0 +1,55 @@
+import type {
+  ChatProvider,
+  ChatProviderWithExtraOptions,
+} from '@xsai-ext/providers/utils'
+
+import type { ProviderInstance } from '../../types'
+
+import { describe, expect, it } from 'vitest'
+
+import { providerDeepSeek } from './index'
+
+type DeepSeekChatProvider = ChatProvider | ChatProviderWithExtraOptions
+
+function isDeepSeekChatProvider(provider: ProviderInstance): provider is DeepSeekChatProvider {
+  return 'chat' in provider && typeof provider.chat === 'function'
+}
+
+function createDeepSeekChatProvider(
+  thinkingMode: 'auto' | 'disable' | 'enable',
+): DeepSeekChatProvider {
+  const provider = providerDeepSeek.createProvider({
+    apiKey: 'sk-test',
+    baseUrl: 'https://api.deepseek.com/',
+    thinkingMode,
+  })
+
+  if (!isDeepSeekChatProvider(provider))
+    throw new Error('DeepSeek provider must support chat')
+
+  return provider
+}
+
+describe('providerDeepSeek.createProvider chat options', () => {
+  it('should not set thinking when thinkingMode is auto', () => {
+    const provider = createDeepSeekChatProvider('auto')
+
+    expect(provider.chat('deepseek-chat')).not.toHaveProperty('thinking')
+  })
+
+  it('should set thinking disabled when thinkingMode is disable', () => {
+    const provider = createDeepSeekChatProvider('disable')
+
+    expect(provider.chat('deepseek-chat')).toMatchObject({
+      thinking: { type: 'disabled' },
+    })
+  })
+
+  it('should set thinking enabled when thinkingMode is enable', () => {
+    const provider = createDeepSeekChatProvider('enable')
+
+    expect(provider.chat('deepseek-chat')).toMatchObject({
+      thinking: { type: 'enabled' },
+    })
+  })
+})
diff --git a/packages/stage-ui/src/libs/providers/providers/deepseek/index.ts b/packages/stage-ui/src/libs/providers/providers/deepseek/index.ts
index 15c1f64dc..b854d6cca 100644
--- a/packages/stage-ui/src/libs/providers/providers/deepseek/index.ts
+++ b/packages/stage-ui/src/libs/providers/providers/deepseek/index.ts
@@ -5,6 +5,8 @@ import { ProviderValidationCheck } from '../../types'
 import { createOpenAICompatibleValidators } from '../../validators'
 import { defineProvider } from '../registry'
 
+type DeepSeekThinkingMode = 'auto' | 'disable' | 'enable'
+
 const deepSeekConfigSchema = z.object({
   apiKey: z
     .string('API Key'),
@@ -12,10 +14,38 @@ const deepSeekConfigSchema = z.object({
     .string('Base URL')
     .optional()
     .default('https://api.deepseek.com/'),
+  thinkingMode: z.enum(['auto', 'disable', 'enable'])
+    .default('auto'),
 })
 
 type DeepSeekConfig = z.input<typeof deepSeekConfigSchema>
 
+function normalizeDeepSeekThinkingMode(value: unknown): DeepSeekThinkingMode {
+  switch (value) {
+    case 'auto':
+    case 'disable':
+    case 'enable':
+      return value
+    default:
+      return 'auto'
+  }
+}
+
+function resolveDeepSeekThinking(modeRaw: unknown): { type: 'disabled' | 'enabled' } | undefined {
+  const mode = normalizeDeepSeekThinkingMode(modeRaw)
+
+  switch (mode) {
+    case 'auto':
+      return undefined
+    case 'disable':
+      return { type: 'disabled' }
+    case 'enable':
+      return { type: 'enabled' }
+    default:
+      return undefined
+  }
+}
+
 export const providerDeepSeek = defineProvider<DeepSeekConfig>({
   id: 'deepseek',
   order: 4,
@@ -39,9 +69,42 @@ export const providerDeepSeek = defineProvider<DeepSeekConfig>({
       descriptionLocalized: t('settings.pages.providers.catalog.edit.config.common.fields.field.base-url.description'),
       placeholderLocalized: t('settings.pages.providers.catalog.edit.config.common.fields.field.base-url.placeholder'),
     }),
+    thinkingMode: deepSeekConfigSchema.shape.thinkingMode.meta({
+      labelLocalized: t('settings.pages.providers.catalog.edit.config.common.fields.field.thinking-mode.label'),
+      descriptionLocalized: t('settings.pages.providers.provider.deepseek.fields.field.thinking-mode.description'),
+      section: 'advanced',
+      type: 'select',
+      options: [
+        {
+          label: t('settings.pages.providers.catalog.edit.config.common.fields.field.thinking-mode.options.auto'),
+          value: 'auto',
+        },
+        {
+          label: t('settings.pages.providers.catalog.edit.config.common.fields.field.thinking-mode.options.disable'),
+          value: 'disable',
+        },
+        {
+          label: t('settings.pages.providers.catalog.edit.config.common.fields.field.thinking-mode.options.enable'),
+          value: 'enable',
+        },
+      ],
+    }),
   }),
   createProvider(config) {
-    return createDeepSeek(config.apiKey, config.baseUrl)
+    const baseProvider = createDeepSeek(config.apiKey, config.baseUrl)
+
+    return {
+      ...baseProvider,
+      chat(model: string) {
+        const chatOptions = baseProvider.chat(model)
+        const thinking = resolveDeepSeekThinking(config.thinkingMode)
+
+        if (thinking === undefined)
+          return chatOptions
+
+        return { ...chatOptions, thinking }
+      },
+    }
   },
 
   validationRequiredWhen(config) {