The present invention relates to a hand tool auxiliary support structure, which mainly comprises a fixing part provided with a sleeve portion, and a fixed belt body is provided on the sleeve portion, the fixing belt body is provided for the sleeve portion and the user's hand The forearm is fixed, and a positioning member is formed under the fixing member, and the positioning member is provided with a insertion hole for the handle insertion of the hand tool; accordingly, when the user holds the hand tool for operation, It can effectively support the positioning of the handle of the hand tool that is held, prevent the hand tool from falling, and increase the practical utility characteristics in its overall application.本創作係有關於一種手工具輔助支撐結構,其主要係令固定件設有套掣部,於該套掣部設有固定帶體,該固定帶體供將該套掣部與使用者手部前臂進行固定,而於該固定件下方則形成有定位件,該定位件開設有插掣孔供手工具之柄部插掣套設;據此,以於使用者握持手工具操作使用時,能有效對所握持之手工具的柄部具有輔助支撐定位功效,防止手工具掉落的情況發生,而在其整體施行使用上更增實用功效特性者。