The invention discloses an intermittent feeding type polystyrene foam compressor. The intermittent feeding type polystyrene foam compressor comprises a crushing box. A crushing motor coaxial with the crushing box is arranged on one side face of the crushing box. A plurality of crushing blades are arranged in the crushing box. The crushing blades are evenly connected to a main rod of the crushing motor. A collection box is arranged at the bottom of the crushing box. A conveying pipe is connected to the lower end of the collection box. An extrusion forming device is arranged outside the crushing box. The discharging end of the conveying pipe communicates with the extrusion forming device. The intermittent feeding type polystyrene foam compressor is characterized in that an intermittent feeding device is arranged outside the crushing box. According to the intermittent feeding type polystyrene foam compressor, since the intermittent feeding device is arranged, polystyrene foam needing to be processed can be processed at a time, and the working efficiency is improved; through intermittent feeding, the machining time is reserved for the compressor; and the intermittent feeding type polystyrene foam compressor is simple in structure and convenient to use.