Preform tail cutting machine

The utility model relates to a preform tail cutting machine which comprises a stand, a clamping mechanism, a cutting mechanism and a conveyor belt, wherein the clamping mechanism and the cutting mechanism are arranged on the stand; the cutting mechanism is located above the clamping mechanism; the conveyor belt is arranged below the clamping mechanism. Through the preform tail cutting machine disclosed by the utility model, a preform is clamped through the clamping mechanism and a plastic head on the preform is cut off through the cutting mechanism; a clamp is loosened and the preform is conveyed out or conveyed to full-process automatic mechanical operation of a next process through the conveyor belt after cutting tail; moreover, plastic heads at the tails of a plurality of preforms can be simultaneously cut off, and thus the working efficiency is high.