High efficiency dewatering hydrocyclone for animal waste, solid-liquid separator has small volume, low speed, simple operation, convenient installation and maintenance, economical and high efficiency, investment recovery fast, etc. what is more, it is wide application;Livestock waste can be separated into liquid waste and solid materials. Liquid water can be applied directly to crops by absorption, solid residues can be used to the lack of fertilizer region, may also have the effect of improving soil structure, keep the 100% nutrition in the raw materials.