diff --git a/components/tommath/Kconfig b/components/tommath/Kconfig
new file mode 100644
index 0000000..49353b7
--- /dev/null
+++ b/components/tommath/Kconfig
@@ -0,0 +1,10 @@
+
+menuconfig TOMMATH_ENABLED
+    bool "Enable libtommath"
+    default n
+
+    config TOMMATH_DYNAMIC
+        bool "compile component as dynamic(shared) lib"
+        default n
+        depends on TOMMATH_ENABLED
+
diff --git a/components/tommath/SConstruct b/components/tommath/SConstruct
new file mode 100644
index 0000000..41a860d
--- /dev/null
+++ b/components/tommath/SConstruct
@@ -0,0 +1,35 @@
+# component2/SConscript
+Import('env')
+import os
+with open(env['PROJECT_TOOL_S']) as f:
+    exec(f.read())
+
+if 'CONFIG_TOMMATH_ENABLED' in os.environ:
+    check_component('libtommath')
+    SRCS=[]
+    INCLUDE=[]
+    PRIVATE_INCLUDE=[]
+    REQUIREMENTS=[]
+    STATIC_LIB=[]
+    DYNAMIC_LIB=[]
+    DEFINITIONS=[]
+    DEFINITIONS_PRIVATE=['-Wall -Wsign-compare -Wextra -Wshadow -Wdeclaration-after-statement -Wbad-function-cast -Wcast-align -Wstrict-prototypes -Wpointer-arith -Wsystem-headers -O3 -funroll-loops -fomit-frame-pointer']
+    LDFLAGS=[]
+    LINK_SEARCH_PATH=[]
+    
+    INCLUDE.append(ADir('../../github_source/libtommath'))
+    SRCS += AGlob('../../github_source/libtommath/*.c*')
+
+    env['COMPONENTS'].append({'target':os.path.basename(env['component_dir']),
+                            'SRCS':SRCS,
+                            'INCLUDE':INCLUDE,
+                            'PRIVATE_INCLUDE':PRIVATE_INCLUDE,
+                            'REQUIREMENTS':REQUIREMENTS,
+                            'STATIC_LIB':STATIC_LIB,
+                            'DYNAMIC_LIB':DYNAMIC_LIB,
+                            'DEFINITIONS':DEFINITIONS,
+                            'DEFINITIONS_PRIVATE':DEFINITIONS_PRIVATE,
+                            'LDFLAGS':LDFLAGS,
+                            'LINK_SEARCH_PATH':LINK_SEARCH_PATH,
+                            'REGISTER':'shared' if 'CONFIG_TOMMATH_DYNAMIC' in os.environ else 'static'
+                            })
diff --git a/github_source/source-list.sh b/github_source/source-list.sh
index 9a661e2..68a01eb 100755
--- a/github_source/source-list.sh
+++ b/github_source/source-list.sh
@@ -37,6 +37,9 @@ git_clone_and_checkout_commit https://github.com/brgl/libgpiod.git   27fe10150f6
 git_clone_and_checkout_commit https://github.com/stephane/libmodbus.git   5c14f13944ec7394a61a7680dcb462056c4321e3
 git_clone_and_checkout_commit https://github.com/lovyan03/LovyanGFX.git   4fd713ebd3019d17c6c89c6e2f7171d2cafeff23
 git_clone_and_checkout_commit https://github.com/Tencent/ncnn.git   5e9bf90455b02a25e7991dab4ab8b3035a4bebb3
+git_clone_and_checkout_commit https://github.com/libtom/libtommath.git   97e500351e653472b2ea00b37137ad0414165efe
+
+
 # opencv-mobile-2.4.13.7-armlinux https://github.com/nihui/opencv-mobile/releases/download/v26/opencv-mobile-2.4.13.7-armlinux.zip
 
 # git clone -b dd5118cab0813078dbbfd116f1489c6a03a42cae --single-branch --branch master https://github.com/dianjixz/mongoose.git