Plastic shredders can be at room temperature for thermoplastics (such as polyethylene, polyvinyl chloride, polypropylene, nylon, etc.) pieces. Compared with the low-temperature cooling grinding equipment, with low energy consumption, energy saving, product particle size uniformity, and easy operation. The device through the disc air-cooled, water improvements, has been basically overcome the crushing heat thermoplastics, the problem of insufficient fineness of the product fineness of 80 mesh - 120 mesh, to smash straight at room temperature, the hourly output of up to 80 kg - 100 kg.