Chip positioning tool

The utility model discloses a piece positioning tool which structurally comprises a bearing base, a mounting base, a limiting rod, a placing groove, a fixing plate, an anti-skid face, a connecting truss, a connecting column, a protective shell, a positioning hole, a side baffle and a limiting locking device, and the anti-skid face and the connecting truss are of an integrated structure. After a bar is positioned, a rotary knob on the limiting locking device can be directly rotated, then the rotary knob can drive a transmission gear below the rotary knob to rotate, after the transmission gear rotates, a driven gear meshed with the transmission gear can be driven, and due to the fact that a turbine rod and the driven gear are of an integrated structure, the transmission gear and the driven gear can be driven to rotate. The turbine rod rotates along with the driven gear, after the turbine rod rotates, the fixing base moves, the fixing base drives the limiting device to stretch out together to fix the limiting de