The invention claims a firmware capable of sensing deformation, comprising a main body, a strain gauge and an operation module. The main body is provided with an action end and a fixed end opposite to the action end; the main body is internally provided with an accommodation hole which axially passes through the action end and the fixed end; the strain gauge is arranged on the wall of the accommodation hole inside the fixed end of the main body; the strain gauge senses the deformation when the fixed end suffers from the radial torque force, and the deformation when the fixed end is bent axially; the operation module is arranged in the accommodation hole of the main body and connected with the strain gauge, and can calculate the deformation sensed by the strain gauge. The invention has functions of sensing the deformation when the firmware suffers from the radial torque force, and sensing the deformation when the firmware suffers from the axial external force.