diff --git a/bsp/cvitek/README.md b/bsp/cvitek/README.md
index 40253a2226..d5c4a0f95e 100755
--- a/bsp/cvitek/README.md
+++ b/bsp/cvitek/README.md
@@ -24,7 +24,8 @@
 支持开发板以及集成 SoC 芯片信息如下
 
 - milk-v duo: [https://milkv.io/duo](https://milkv.io/duo)，SoC 采用 CV1800B。
-- milk-v duo256m: [https://milkv.io/duo256m](https://milkv.io/docs/duo/getting-started/duo256m)，SoC 采用 SG2002。
+- milk-v duo256m: [https://milkv.io/duo256m](https://milkv.io/docs/duo/getting-started/duo256m)，SoC 采用 SG2002（原 CV181xC）。
+- milk-v duos: [https://milkv.io/duos](https://milkv.io/docs/duo/getting-started/duos)，SoC 采用 SG2000（原 CV181xH）。
 
 Duo 家族开发板采用 CV18xx 系列芯片。芯片的工作模式总结如下：
 
@@ -109,6 +110,7 @@ Board Type (milkv-duo)  --->
     ( ) milkv-duo-spinor
     (X) milkv-duo256m
     ( ) milkv-duo256m-spinor
+    ( ) milkv-duos
 ```
 
 2. 编译
diff --git a/bsp/cvitek/board_env.sh b/bsp/cvitek/board_env.sh
index 748fc2c46a..dd25229af8 100755
--- a/bsp/cvitek/board_env.sh
+++ b/bsp/cvitek/board_env.sh
@@ -2,9 +2,9 @@
 
 function get_board_type()
 {
-	BOARD_CONFIG=("CONFIG_BOARD_TYPE_MILKV_DUO" "CONFIG_BOARD_TYPE_MILKV_DUO_SPINOR" "CONFIG_BOARD_TYPE_MILKV_DUO_SPINAND" "CONFIG_BOARD_TYPE_MILKV_DUO256M" "CONFIG_BOARD_TYPE_MILKV_DUO256M_SPINOR" "CONFIG_BOARD_TYPE_MILKV_DUO256M_SPINAND")
-	BOARD_VALUE=("milkv-duo" "milkv-duo-spinor" "milkv-duo-spinand" "milkv-duo256m" "milkv-duo256m-spinor" "milkv-duo256m-spinand")
-	STORAGE_VAUE=("sd" "spinor" "spinand" "sd" "spinor" "spinand")
+	BOARD_CONFIG=("CONFIG_BOARD_TYPE_MILKV_DUO" "CONFIG_BOARD_TYPE_MILKV_DUO_SPINOR" "CONFIG_BOARD_TYPE_MILKV_DUO_SPINAND" "CONFIG_BOARD_TYPE_MILKV_DUO256M" "CONFIG_BOARD_TYPE_MILKV_DUO256M_SPINOR" "CONFIG_BOARD_TYPE_MILKV_DUO256M_SPINAND" "CONFIG_BOARD_TYPE_MILKV_DUOS")
+	BOARD_VALUE=("milkv-duo" "milkv-duo-spinor" "milkv-duo-spinand" "milkv-duo256m" "milkv-duo256m-spinor" "milkv-duo256m-spinand" "milkv-duos-sd")
+	STORAGE_VAUE=("sd" "spinor" "spinand" "sd" "spinor" "spinand" "sd")
 
 	for ((i=0;i<${#BOARD_CONFIG[@]};i++))
 	do
diff --git a/bsp/cvitek/c906_little/Kconfig b/bsp/cvitek/c906_little/Kconfig
index f2b62507fd..6e007eb2b8 100755
--- a/bsp/cvitek/c906_little/Kconfig
+++ b/bsp/cvitek/c906_little/Kconfig
@@ -42,6 +42,10 @@ config SOC_TYPE_CV180X
     bool
     default n
 
+config SOC_TYPE_SG2000
+    bool
+    default n
+
 config SOC_TYPE_SG2002
     bool
     default n
@@ -66,4 +70,8 @@ choice
         select SOC_TYPE_SG2002
         bool "milkv-duo256m-spinor"
 
+    config BOARD_TYPE_MILKV_DUOS
+        select SOC_TYPE_SG2000
+        bool "milkv-duos"
+
 endchoice
diff --git a/bsp/cvitek/c906_little/SConstruct b/bsp/cvitek/c906_little/SConstruct
index 6d07b7f5a7..816412eb48 100755
--- a/bsp/cvitek/c906_little/SConstruct
+++ b/bsp/cvitek/c906_little/SConstruct
@@ -34,7 +34,7 @@ objs = PrepareBuilding(env, RTT_ROOT, has_libcpu = False)
 # include libraries
 objs.extend(SConscript(drivers_path_prefix + '/SConscript', variant_dir='build/drivers', duplicate=0))
 
-if GetDepend('BOARD_TYPE_MILKV_DUO256M'):
+if GetDepend('BOARD_TYPE_MILKV_DUO256M') or GetDepend('BOARD_TYPE_MILKV_DUOS'):
     env['LINKFLAGS'] = env['LINKFLAGS'].replace('cv180x_lscript.ld', 'cv181x_lscript.ld')
     env['LINKFLAGS'] = env['LINKFLAGS'].replace('-L board/script/cv180x', '-L board/script/cv181x')
 
diff --git a/bsp/cvitek/cv18xx_risc-v/Kconfig b/bsp/cvitek/cv18xx_risc-v/Kconfig
index c643459014..ba6b0889d2 100755
--- a/bsp/cvitek/cv18xx_risc-v/Kconfig
+++ b/bsp/cvitek/cv18xx_risc-v/Kconfig
@@ -48,6 +48,10 @@ config SOC_TYPE_CV180X
     bool
     default n
 
+config SOC_TYPE_SG2000
+    bool
+    default n
+
 config SOC_TYPE_SG2002
     bool
     default n
@@ -72,6 +76,10 @@ choice
         select SOC_TYPE_SG2002
         bool "milkv-duo256m-spinor"
 
+    config BOARD_TYPE_MILKV_DUOS
+        select SOC_TYPE_SG2000
+        bool "milkv-duos"
+
 endchoice
 
 choice BSP_ROOTFS_TYPE
diff --git a/bsp/cvitek/cv18xx_risc-v/applications/main.c b/bsp/cvitek/cv18xx_risc-v/applications/main.c
index eb689ece32..e5e10d121e 100755
--- a/bsp/cvitek/cv18xx_risc-v/applications/main.c
+++ b/bsp/cvitek/cv18xx_risc-v/applications/main.c
@@ -16,6 +16,8 @@
 #define LED_PIN     "E02" /* Onboard LED pins */
 #elif defined(BOARD_TYPE_MILKV_DUO) || defined(BOARD_TYPE_MILKV_DUO_SPINOR)
 #define LED_PIN     "C24" /* Onboard LED pins */
+#elif defined(BOARD_TYPE_MILKV_DUOS)
+#define LED_PIN     "A29" /* Onboard LED pins */
 #endif
 
 int main(void)
diff --git a/bsp/cvitek/cv18xx_risc-v/dtb/milkv-duos-sd/cv1813h_milkv_duos_sd.dtb b/bsp/cvitek/cv18xx_risc-v/dtb/milkv-duos-sd/cv1813h_milkv_duos_sd.dtb
new file mode 100644
index 0000000000..35f375a773
Binary files /dev/null and b/bsp/cvitek/cv18xx_risc-v/dtb/milkv-duos-sd/cv1813h_milkv_duos_sd.dtb differ
diff --git a/bsp/cvitek/cv18xx_risc-v/dtb/milkv-duos-sd/multi.its b/bsp/cvitek/cv18xx_risc-v/dtb/milkv-duos-sd/multi.its
new file mode 100644
index 0000000000..4eb14f3ea2
--- /dev/null
+++ b/bsp/cvitek/cv18xx_risc-v/dtb/milkv-duos-sd/multi.its
@@ -0,0 +1,56 @@
+/*
+ * U-Boot uImage source file with multiple kernels, ramdisks and FDT blobs
+ */
+
+/dts-v1/;
+
+/ {
+	description = "Various kernels, ramdisks and FDT blobs";
+	#address-cells = <2>;
+
+	images {
+		kernel-1 {
+			description = "cvitek kernel";
+			data = /incbin/("./Image.lzma");
+			type = "kernel";
+			arch = "riscv";
+			os = "linux";
+			compression = "lzma";
+			load = <0x0 0x80200000>;
+			entry = <0x0 0x80200000>;
+			hash-2 {
+				algo = "crc32";
+			};
+		};
+
+
+		/*FDT*/
+    
+        fdt-cv1813h_milkv_duos_sd {
+            description = "cvitek device tree - cv1813h_milkv_duos_sd";
+            data = /incbin/("./cv1813h_milkv_duos_sd.dtb");
+            type = "flat_dt";
+            arch = "riscv";
+            compression = "none";
+            hash-1 {
+                algo = "sha256";
+            };
+        };
+
+
+
+	};
+
+	/*CFG*/
+    configurations {
+        
+        config-cv1813h_milkv_duos_sd {
+            description = "boot cvitek system with board cv1813h_milkv_duos_sd";
+            kernel = "kernel-1";
+            fdt = "fdt-cv1813h_milkv_duos_sd";
+        };
+
+    };
+
+
+};
diff --git a/bsp/cvitek/drivers/SConscript b/bsp/cvitek/drivers/SConscript
index 61d65b7697..e6333eadde 100755
--- a/bsp/cvitek/drivers/SConscript
+++ b/bsp/cvitek/drivers/SConscript
@@ -12,7 +12,7 @@ CPPDEFINES = []
 CPPPATH = [cwd]
 
 CHIP_TYPE = 'cv180x'
-if GetDepend('BOARD_TYPE_MILKV_DUO256M') or GetDepend('BOARD_TYPE_MILKV_DUO256M_SPINOR') or GetDepend('BOARD_TYPE_MILKV_DUO256M_SPINAND'):
+if GetDepend('BOARD_TYPE_MILKV_DUO256M') or GetDepend('BOARD_TYPE_MILKV_DUO256M_SPINOR') or GetDepend('BOARD_TYPE_MILKV_DUO256M_SPINAND') or GetDepend('BOARD_TYPE_MILKV_DUOS'):
     CHIP_TYPE = 'cv181x'
 elif GetDepend('BOARD_TYPE_MILKV_DUO') or GetDepend('BOARD_TYPE_MILKV_DUO_SPINOR') or GetDepend('BOARD_TYPE_MILKV_DUO_SPINAND'):
     CHIP_TYPE = 'cv180x'
diff --git a/bsp/cvitek/drivers/drv_pinmux.c b/bsp/cvitek/drivers/drv_pinmux.c
index 17e7857944..9d9fb49246 100644
--- a/bsp/cvitek/drivers/drv_pinmux.c
+++ b/bsp/cvitek/drivers/drv_pinmux.c
@@ -230,7 +230,7 @@ const struct fselect pin_selects_array[][8] = {
 /* PAD_AUD_AOUTR    */ {FS_NONE,             FS_NONE,            FS_NONE,           {XGPIOC_24, 3},   {IIS1_DI, 4},   {IIS2_DO, 5},     {IIS1_DO, 6},           FS_NONE},
 };
 
-#elif defined(SOC_TYPE_SG2002)
+#elif defined(SOC_TYPE_SG2002) || defined(SOC_TYPE_SG2000)
 
 struct fmux pinmux_array[] = {
     FS_PINMUX(CAM_MCLK0),
diff --git a/bsp/cvitek/drivers/drv_uart.c b/bsp/cvitek/drivers/drv_uart.c
index 7da298452f..d540117b3f 100644
--- a/bsp/cvitek/drivers/drv_uart.c
+++ b/bsp/cvitek/drivers/drv_uart.c
@@ -357,6 +357,71 @@ static const char *pinname_whitelist_uart4_tx[] = {
 };
 #endif
 
+#elif defined(BOARD_TYPE_MILKV_DUOS)
+
+#ifdef BSP_USING_UART0
+static const char *pinname_whitelist_uart0_rx[] = {
+    "UART0_RX",
+    NULL,
+};
+static const char *pinname_whitelist_uart0_tx[] = {
+    "UART0_TX",
+    NULL,
+};
+#endif
+
+#ifdef BSP_USING_UART1
+static const char *pinname_whitelist_uart1_rx[] = {
+    "JTAG_CPU_TCK",
+    "UART0_RX",
+    NULL,
+};
+static const char *pinname_whitelist_uart1_tx[] = {
+    "JTAG_CPU_TMS",
+    "UART0_TX",
+    "IIC0_SCL",
+    NULL,
+};
+#endif
+
+#ifdef BSP_USING_UART2
+static const char *pinname_whitelist_uart2_rx[] = {
+    "VIVO_D9",
+    "VIVO_D5",
+    "VIVO_CLK",
+    "PWR_GPIO1",
+    NULL,
+};
+static const char *pinname_whitelist_uart2_tx[] = {
+    "VIVO_D10",
+    "VIVO_D6",
+    "VIVO_D2",
+    "IIC0_SCL",
+    "PWR_GPIO0",
+    NULL,
+};
+#endif
+
+#ifdef BSP_USING_UART3
+static const char *pinname_whitelist_uart3_rx[] = {
+    "ADC2",
+    NULL,
+};
+static const char *pinname_whitelist_uart3_tx[] = {
+    "ADC3",
+    NULL,
+};
+#endif
+
+#ifdef BSP_USING_UART4
+static const char *pinname_whitelist_uart4_rx[] = {
+    NULL,
+};
+static const char *pinname_whitelist_uart4_tx[] = {
+    NULL,
+};
+#endif
+
 #else
     #error "Unsupported board type!"
 #endif