Screw tap multi-line grinding machine

The utility model provides a screw tap multi-line grinding machine and belongs to the technical field of metal-cutting machine tools. The utility model aims at solving the problem that the existing screw tap multi-line grinding machine has low machining efficiency and low precision. The screw tap multi-line grinding machine comprises a machine frame and a grinding wheel device with a grinding wheel, wherein the grinding wheel device is fixedly installed on the machine frame; a swing frame is arranged on the upper end surface of the machine frame, and the upper end surface of the swing frame is fixedly connected with a workbench; the two side surfaces of the workbench are respectively provided with slide grooves; a head frame and a tail frame are arranged on one of the slide grooves, can move along the slide groove and are respectively provided with a driving top shaft and a driven top shaft for clamping a screw tap; a driving motor I connected with the driving top shaft is also installed on the head frame; on