Plastic film trimming mechanism

A plastic film trimming mechanism comprises a clamping roller, a left cutter and a right cutter, the clamping roller comprises a front clamping roller located in front of a film and a rear clamping roller located behind the film, annular grooves extending in the circumferential direction are formed in the left end and the right end of the front clamping roller respectively, and cutting edges of the left cutter and the right cutter extend into groove cavities of the left annular groove and the right annular groove respectively; the rear clamping roller is divided into a rear clamping roller middle section and rear clamping roller outer side sections, the rear clamping roller outer side section and the rear clamping roller middle section located on the left side are disconnected in the axial direction and located on the two sides of the cutter on the left side respectively, and the rear clamping roller outer side section and the rear clamping roller middle section located on the right side are disconnected in t