This series of products was developed with absorbing the advantages of the crusher，and with making full use of grinding theory research. When operating, the materials can be crushed fully within the crushing cavity。And it is effective, large yield, low power consumption, high efficiency, output material is quite evenly. What’s better, it is low noise, no pollution, simple operation, convenient maintenance. This equipment can be fed automatically, and save manpower, etc. This series product specification is well，and the feeder size can rage from 20mm to 825 mm, It is a preferred primary crushing the equipment. High-yield wood powder machine (special crusher) will be widely applied in chemical industry, building materials, medicine, health care, farming, food, mosquito-repellent incense and so on.