Door and window sealing strip cutting device

The utility model discloses a door and window sealing strip cutting device, and relates to the technical field of cutting devices. The door and window sealing strip cutting device comprises a conveying belt, the lower surface of the conveying belt is fixedly connected with four supporting columns, the front end and the rear end of the upper surface of the conveying belt are each fixedly connected with two fixing plates which are correspondingly arranged in the left-right direction, and the upper ends of the opposite faces of the two fixing plates which correspond in the left-right direction are each fixedly connected with a supporting plate; lifting air cylinders are fixedly connected to the middles of the upper surfaces of the two supporting plates correspondingly, the output ends of the two lifting air cylinders slidably penetrate out of the lower surfaces of the two supporting plates correspondingly, when the six pressing rollers make contact with the upper surface of the sealing strip, the two hydraulic a