diff --git a/tools/build/sdk_resource.py b/tools/build/sdk_resource.py
index a562b26c8..e0ec95af9 100644
--- a/tools/build/sdk_resource.py
+++ b/tools/build/sdk_resource.py
@@ -1788,6 +1788,14 @@ def BuildJLinkLoadScript(main_env):
     generate_uart_download_sh(main_env, device, memory, download_list)
     generate_sftool_param(main_env, device, memory, download_file)
 
+def get_baud_rate():
+    baud_rate = os.getenv("SIFLI_DOWNLOAD_BAUD_RATE", "").strip()
+    if baud_rate.isdigit():
+        rate_num = int(baud_rate)
+        if 115200 <= rate_num <= 3000000:
+            return f"-b {rate_num}"
+    return ""
+
 
 def generate_uart_download_bat(main_env, device, memory, download_list, ImgDownUart_PATH):
     uart_comment = '''@echo off
@@ -1815,7 +1823,7 @@ def generate_uart_download_bat(main_env, device, memory, download_list, ImgDownU
 cd %CURR_PATH%
 '''.format(ImgDownUart_PATH, main_env['JLINK_DEVICE']))
     else:
-        uart_comment += MakeLine(f"sftool -p COM%input% -c {device} -m {memory.lower()} write_flash {download_list}\n")
+        uart_comment += MakeLine(f"sftool -p COM%input% {get_baud_rate()} -c {device} -m {memory.lower()} write_flash {download_list}\n")
     uart_comment += MakeLine('if "%ENV_ROOT%"=="" pause\n')
     
     uart_f = open(os.path.join(main_env['build_dir'], 'uart_download.bat'), 'w')
@@ -1893,7 +1901,7 @@ def generate_uart_download_sh(main_env, device, memory,download_list):
     if os.getenv("LEGACY_ENV"):
         uart_comment += MakeLine('echo "Legacy mode is not supported on Linux/macOS"')
     else:
-        uart_comment += MakeLine(f'sftool -p "$input" -c {device} -m {memory.lower()} write_flash {download_list}\n')
+        uart_comment += MakeLine(f'sftool -p "$input" {get_baud_rate()} -c {device} -m {memory.lower()} write_flash {download_list}\n')
     
     uart_sh_path = os.path.join(main_env['build_dir'], 'uart_download.sh')
     uart_f = open(uart_sh_path, 'w')
diff --git a/tools/sdk_py_actions/flash_ext.py b/tools/sdk_py_actions/flash_ext.py
index df8e0f818..23198d2e1 100644
--- a/tools/sdk_py_actions/flash_ext.py
+++ b/tools/sdk_py_actions/flash_ext.py
@@ -169,8 +169,16 @@ def flash_callback(
 
     raise UsageError(f"Unsupported protocol: {protocol}")
 
+def get_baud_rate():
+    baud_rate = os.getenv("SIFLI_DOWNLOAD_BAUD_RATE", "").strip()
+    if baud_rate.isdigit():
+        rate_num = int(baud_rate)
+        if 115200 <= rate_num <= 3000000:
+            return rate_num
+    return 1000000
 
 def register(registry: CommandRegistry) -> None:
+    baud = get_baud_rate()
     registry.command(
         path="flash",
         callback=flash_callback,
@@ -192,7 +200,7 @@ def register(registry: CommandRegistry) -> None:
                 "names": ["-b", "--baud"],
                 "help": "Baud rate for UART flash.",
                 "type": int,
-                "default": 1000000,
+                "default": baud,
             },
             {
                 "names": ["-d", "--device"],