diff --git a/platform/mellanox/mlnx-sai.mk b/platform/mellanox/mlnx-sai.mk
index bf5795c175d..d0e476aa664 100644
--- a/platform/mellanox/mlnx-sai.mk
+++ b/platform/mellanox/mlnx-sai.mk
@@ -9,13 +9,17 @@ MLNX_SAI_DEB_VERSION = $(subst -,.,$(subst _,.,$(MLNX_SAI_VERSION)))
 # Place here URL where SAI sources exist
 MLNX_SAI_SOURCE_BASE_URL = 
 
-ifneq ($(MLNX_SAI_SOURCE_BASE_URL), )
-SAI_FROM_SRC = y
-else
-SAI_FROM_SRC = n
-endif
+# Optional local file path. If set, it will be used instead of downloading from the remote server.
+# Note: When using a local SAI file, DOCKER_BUILDER_USER_MOUNT must also be configured to ensure 
+# the file is mounted inside the docker build environment.
+# Example:
+# DOCKER_BUILDER_USER_MOUNT = /auto/local_build:/auto/local_build:rslave
+MLNX_LOCAL_SAI_FILE ?= 
+
+# Set SAI_FROM_SRC based on source availability
+SAI_FROM_SRC = $(if $(or $(MLNX_SAI_SOURCE_BASE_URL),$(MLNX_LOCAL_SAI_FILE)),y,n)
 
-export MLNX_SAI_VERSION MLNX_SAI_SOURCE_BASE_URL
+export MLNX_SAI_VERSION MLNX_SAI_SOURCE_BASE_URL MLNX_LOCAL_SAI_FILE
 
 MLNX_SAI = mlnx-sai_1.mlnx.$(MLNX_SAI_VERSION)_$(CONFIGURED_ARCH).deb
 $(MLNX_SAI)_SRC_PATH = $(PLATFORM_PATH)/mlnx-sai
diff --git a/platform/mellanox/mlnx-sai/Makefile b/platform/mellanox/mlnx-sai/Makefile
index ecfba91fd75..c27815763e1 100644
--- a/platform/mellanox/mlnx-sai/Makefile
+++ b/platform/mellanox/mlnx-sai/Makefile
@@ -7,7 +7,12 @@ DERIVED_TARGETS = mlnx-sai-dbgsym_1.mlnx.$(MLNX_SAI_VERSION)_$(CONFIGURED_ARCH).
 
 $(addprefix $(DEST)/, $(MAIN_TARGET)): $(DEST)/% :
 	rm -rf mlnx_sai
-	wget -c $(MLNX_SAI_SOURCE_BASE_URL)/$(MLNX_SAI_VERSION).tar.gz -O - | tar -xz
+	if [ -n "$(MLNX_LOCAL_SAI_FILE)" ] && [ -f "$(MLNX_LOCAL_SAI_FILE)" ]; then
+		echo "Using local SAI file: $(MLNX_LOCAL_SAI_FILE)"
+		tar -xzf $(MLNX_LOCAL_SAI_FILE)
+	else
+		wget -c $(MLNX_SAI_SOURCE_BASE_URL)/$(MLNX_SAI_VERSION).tar.gz -O - | tar -xz
+	fi
 	pushd mlnx_sai
 
 	debuild -e 'make_extra_flags="DEFS=-DACS_OS -DCONFIG_SYSLOG"' -us -uc -d -b