Material clamping device of bending tester

The utility model relates to the technical field of bending testing machines, and provides a material clamping device of a bending testing machine, which is convenient for guaranteeing the stability of the axial lead of a steel bar and comprises a bending testing machine body, the bending testing machine body is provided with a frame, the frame is provided with two sliding chutes, the interiors of the sliding chutes are connected with sliding blocks in a sliding manner, and the sliding blocks are connected with limiting pieces. An adjusting rod is rotationally connected into the two sliding grooves, a first motor is installed on the frame, the output end of the first motor is fixedly connected with the adjusting rod, two external threads with opposite rotating directions are arranged on the periphery of the adjusting rod, the sliding block is in threaded connection with the adjusting rod, the sliding block is connected with a supporting rod, and the top end of the supporting rod is connected with a V-shaped f