Counter of screw machine

The invention discloses a counter of a screw machine. The counter comprises a base for supporting, a guide block, a feeding device, a supporting frame and a counting mechanism, wherein the guide blockis arranged on the base, the upper end face of the guide block is provided with a guide groove, the groove width of the guide groove is larger than rod bodies of screws and smaller than nuts of the screws, the feeding device is arranged at the inlet end of the guide groove and used for feeding the screws into the guide groove one by one, the supporting frame is provided with a slide groove located above the guide groove, the slide groove and the guide groove are the same in direction, the counting mechanism comprises a first telescopic motor and a second telescopic motor which are adjustablyinstalled in the slide groove in the sequence from the outlet to the inlet of the guide groove, and a telescopic rod of the first telescopic motor and a telescopic rod of the second telescopic motor can do telescopic movements