The hammer mill of 40,50,60,65 type are special products. It is the most ideal grinding equipment of all kinds of stalk, weed, corn, soybean, PVC foaming board,rubber, and etc. Structure reasonable, firm durable, safe reliable, easy operation, the vibration small, and the efficiency is high. It is widely used in the professions such as fodder factory, cultivation factory, organic fertilizer factory, Chinese medicine, chemical industry and so on.