diff --git a/api/@internal/component/ets/tab_content.d.ts b/api/@internal/component/ets/tab_content.d.ts
index 56eb3f714ad4c8d34039f841e950dbc7940aff3f..7b3c57cfeaab6808bf748a4051f54d799818e16c 100644
--- a/api/@internal/component/ets/tab_content.d.ts
+++ b/api/@internal/component/ets/tab_content.d.ts
@@ -386,6 +386,7 @@ interface BoardStyle {
    * Define the border radius of the board
    *
    * @type { ?Length }
+   * @default 8.0vp
    * @syscap SystemCapability.ArkUI.ArkUI.Full
    * @crossplatform
    * @atomicservice
@@ -465,6 +466,7 @@ declare interface LabelStyle {
    * Minimum font size of the label text.
    *
    * @type { ?(number | ResourceStr) }
+   * @default 0.0fp
    * @syscap SystemCapability.ArkUI.ArkUI.Full
    * @crossplatform
    * @atomicservice
@@ -484,6 +486,7 @@ declare interface LabelStyle {
    * Maximum font size of the label text.
    *
    * @type { ?(number | ResourceStr) }
+   * @default 0.0fp
    * @syscap SystemCapability.ArkUI.ArkUI.Full
    * @crossplatform
    * @atomicservice
@@ -523,6 +526,8 @@ declare interface LabelStyle {
    * Font of the label text.
    *
    * @type { ?Font }
+   * When setting the tabBar to BottomTabBarStyle, the default font size is 10.0fp.
+   * When setting the tabBar to SubTabBarStyle, the default font size is 16.0fp.
    * @syscap SystemCapability.ArkUI.ArkUI.Full
    * @crossplatform
    * @atomicservice
@@ -679,6 +684,7 @@ declare interface TabBarIconStyle {
    * The icon color of the selected tab bar.
    *
    * @type { ?ResourceColor }
+   * @default #FF007DFF
    * @syscap SystemCapability.ArkUI.ArkUI.Full
    * @crossplatform
    * @atomicservice
@@ -691,6 +697,7 @@ declare interface TabBarIconStyle {
    * The icon color of the unselected tab bar.
    *
    * @type { ?ResourceColor }
+   * @default #33182431
    * @syscap SystemCapability.ArkUI.ArkUI.Full
    * @crossplatform
    * @atomicservice
@@ -1086,7 +1093,8 @@ declare class SubTabBarStyle {
    * <br>When the parameter is of the Dimension type, the value applies to all sides.
    * </p>
    *
-   * @param { Padding | Dimension } value - indicates the padding of the sub tab bar
+   * @param { Padding | Dimension } value - indicates the padding of the sub tab bar, default value:
+   *                                        left: 8.0vp, right: 8.0vp, top: 17.0vp, bottom: 18.0vp.
    * @returns { SubTabBarStyle } the style of the sub tab bar
    * @syscap SystemCapability.ArkUI.ArkUI.Full
    * @crossplatform
@@ -1103,7 +1111,9 @@ declare class SubTabBarStyle {
    * <br>This API supports mirroring but does not support percentage-based settings.
    * </p>
    *
-   * @param { LocalizedPadding } padding - indicates the padding of the sub tab bar
+   * @param { LocalizedPadding } padding - indicates the padding of the sub tab bar, default value:
+   *                                       start: LengthMetircs.vp(8), end: LengthMetircs.vp(8),
+   *                                       top: LengthMetircs.vp(17), bottom: LengthMetircs.vp(18).
    * @returns { SubTabBarStyle } the style of the sub tab bar
    * @syscap SystemCapability.ArkUI.ArkUI.Full
    * @crossplatform
diff --git a/api/@internal/component/ets/tabs.d.ts b/api/@internal/component/ets/tabs.d.ts
index 70585576858fd5220485e98ada405a0238bc1f26..d558b75bac5b5aad31f2f7ee9e62939da2015c23 100644
--- a/api/@internal/component/ets/tabs.d.ts
+++ b/api/@internal/component/ets/tabs.d.ts
@@ -448,7 +448,7 @@ declare class TabsController {
   /**
    * Called when need to preload specified tab content.
    *
-   * @param { Optional<Array<number>> } indices - Indices of tab content to be preloaded.
+   * @param { Optional<Array<number>> } indices - Indices of tab content to be preloaded, default to an empty array.
    * @returns { Promise<void> } The promise returned by the function.
    * @throws { BusinessError } 401 - Parameter invalid. Possible causes:
    * <br> 1. The parameter type is not Array<number>.
@@ -477,7 +477,7 @@ declare class TabsController {
   /**
    * Set tab bar opacity.
    *
-   * @param { number } opacity - opacity
+   * @param { number } opacity - opacity, default to 1.0
    * @syscap SystemCapability.ArkUI.ArkUI.Full
    * @crossplatform
    * @atomicservice
@@ -517,6 +517,7 @@ declare interface TabsOptions {
    * Set the tab location for Tabs.
    *
    * @type { ?BarPosition }
+   * @default BarPosition.Start
    * @syscap SystemCapability.ArkUI.ArkUI.Full
    * @crossplatform
    * @atomicservice
@@ -544,6 +545,7 @@ declare interface TabsOptions {
    * Set the index of the currently displayed tab.
    *
    * @type { ?number }
+   * @default 0
    * @syscap SystemCapability.ArkUI.ArkUI.Full
    * @crossplatform
    * @atomicservice
@@ -1441,7 +1443,9 @@ declare class TabsAttribute extends CommonMethod<TabsAttribute> {
   /**
    * Called when the animation duration of the bar graph is set.
    *
-   * @param { number } value
+   * @param { number } value - default value:
+   *                           When this property is not set or set to null, the default value is 0.
+   *                           When set to a value less than 0 or undefined, the default value is 300.
    * @returns { TabsAttribute }
    * @syscap SystemCapability.ArkUI.ArkUI.Full
    * @crossplatform
@@ -1451,7 +1455,9 @@ declare class TabsAttribute extends CommonMethod<TabsAttribute> {
    * Sets the length of time required to complete the tab switching animation,
    * which is initiated by clicking a specific tab or by calling the changeIndex API of TabsController.
    *
-   * @param { number } value
+   * @param { number } value - default value:
+   *                           When this property is not set or set to null, the default value is 0.
+   *                           When set to a value less than 0 or undefined, the default value is 300.
    * @returns { TabsAttribute }
    * @syscap SystemCapability.ArkUI.ArkUI.Full
    * @crossplatform
@@ -1983,8 +1989,8 @@ declare class TabsAttribute extends CommonMethod<TabsAttribute> {
   /**
    * Sets the maximum number of child components to be cached.
    *
-   * @param { number } count - the maximum number of child components to be cached.
-   * @param { TabsCacheMode } mode - the mode of caching child components.
+   * @param { number } count - the maximum number of child components to be cached, default to 0.
+   * @param { TabsCacheMode } mode - the mode of caching child components, default to TabsCacheMode.CACHE_BOTH_SIDE.
    * @returns { TabsAttribute }
    * @syscap SystemCapability.ArkUI.ArkUI.Full
    * @crossplatform