Clamping tool of handheld electric grinding machine

A clamping tool of a handheld electric grinding machine comprises a supporting cross beam, a first sliding block and a second sliding block, a positioning hole is formed in the middle of the supporting cross beam, a positioning bolt is arranged on the supporting cross beam in a threaded fit mode and extends in the radial direction of the positioning hole, a first lead screw and a second lead screw are rotatably arranged on the supporting cross beam, and the thread rotation directions of the first lead screw and the second lead screw are opposite. One end of the connecting rod is meshed with the first lead screw, the other end of the connecting rod is meshed with the second lead screw, the first sliding block and the second sliding block are arranged on the supporting cross beam in a sliding fit mode and symmetrically distributed along the positioning hole, and the first sliding block is driven by the first lead screw to act in the length direction of the supporting cross beam. The second sliding block is driv