Cutting equipment capable of achieving fixed-length cutting

The utility model relates to the technical field of plastic film production, and discloses a cutting device capable of fixed-length cutting, which comprises a cutting machine, a workbench is fixedly mounted on the surface of the cutting machine, a fixing assembly is arranged in the workbench, a positioning assembly is arranged on the surface of the cutting machine, and the positioning assembly comprises a motor, a fixed-length cutting assembly and a fixed-length cutting assembly. The motor is fixedly installed on the back face of the cutting machine, a reciprocating lead screw is fixedly installed on the surface of an output shaft of the motor, and the reciprocating lead screw is rotationally connected to the surface of the cutting machine. And when the gear rotates forwards, a connecting plate on the surface of the gear can be driven to slide towards the right side, so that a moving plate is driven to move towards the right side, a plastic film is accurately cut with the same length, and the cutting quality