Fixed-length cutting device for PVC plastic floor

The invention discloses a fixed-length cutting device for a PVC plastic floor. The fixed-length cutting device for the PVC plastic floor comprises a base, a cutting mechanism, a conveying mechanism and a PLC. An infrared inductor is arranged right ahead of a cutting knife and can accurately sense the position situation of the PVC plastic floor, the PVC plastic floor can be precisely cut, the machining precision of the PVC plastic floor is improved, the length of the cut PVC plastic floor meets the precision requirement, and the cutting knife carries out reciprocating rotary cutting through a lead screw, a motor, an air cylinder and an air cylinder pushing rod. Compared with one-side punch forming, the cutting cannot damage the PVC plastic floor, the damage to the PVC plastic floor in the cutting process is avoided, the cutting precision of the cutting knife to the PVC plastic floor can be improved through reciprocating rotary cutting, a rotating shaft and a rotating motor are arrangedat a joint of a knife rest and the cutting knife, the cutting precision of the cutting knife to the PVC plastic floor can be further improved, and the damage to the PVC plastic floor from the cuttingknife is reduced.