Tapping machine gantry capable of automatically fixing workpieces

The utility model discloses a tapping machine gantry capable of automatically fixing a workpiece, which comprises a gantry tapping machine, a working table is arranged on the front side of the gantry tapping machine, a moving groove is formed in the top of the working table, a long plate is arranged in the moving groove, a double-shaft motor is fixedly connected to the top of the long plate, and the double-shaft motor is fixedly connected to the top of the long plate. The output end of the double-shaft motor is fixedly connected with a first reciprocating lead screw, the two sides of the first reciprocating lead screw are movably connected with short blocks through bearings, and the bottoms of the short blocks are fixedly connected to the two sides of the top of the long plate. According to the tapping machine, the first motor starts to operate, the first motor drives the long plate to move through the second reciprocating lead screw and the transmission block, the double-shaft motor fixes a workpiece through