Tapping machine with workpiece positioning function

The tapping machine with the workpiece positioning function comprises a base, a stand column is installed at one end of the top of the base, a fixing base is installed at one end of the stand column, a connecting base is installed on the outer side of the stand column below the fixing base, and a first electric push rod is installed at the top end of the fixing base. And the output end of the first electric push rod vertically penetrates through the interior of the fixed seat and is connected with the connecting seat. According to the utility model, the rotary knob is rotated to drive the positive and negative tooth screw rod to rotate, and under the action of threaded connection, the threaded sleeve drives the fixing block at the bottom end to move inwards at the same time so as to drive the fixing block to be pulled out of the fixing groove, so that the limiting of the clamping block and the clamping groove is canceled, and the function of quickly replacing the tapping head is realized through the separatio