Plastic extruder with cooling function

The utility model discloses a plastic extruder with a cooling function, which comprises a horizontally arranged extrusion cylinder, a feeding hopper for feeding is arranged on the left upper side of the extrusion cylinder, a heating block for melting materials is arranged on the outer side of the extrusion cylinder, an extrusion mechanism for extruding the molten materials is arranged in the extrusion cylinder, and a cooling mechanism is arranged on the right upper side of the extrusion cylinder. A plurality of extrusion holes used for discharging are formed in a discharging opening in the right end of the extrusion cylinder, a cutting box is arranged at the position, where the extrusion holes are located, of the right end of the extrusion cylinder, a cutting mechanism used for cutting off plastic strips is arranged at the position of the cutting box, and a cooling assembly used for cooling cut-off plastic is arranged below the cutting box. The cooling device is designed for overcoming the defects of an exist