impact modifier to improve PP melting index, improve recycled PP injection molding raw material processing liquidity, by attacking PP molecular chain, change PP molecular weight, improve PP injection molding when the liquidity reduced injection pressure and processing temperature. Reduce PE melting index, improve the flow of recycled HDPE extrusion processing, reduce the molten finger of recycled HDPE used to meet the requirements of pipeline extrusion on the original flow. Through the waste plastic recycling, crushing, cleaning, processing and other steps to obtain recycled plastic, then the recycled plastic use impact modifier modified, resulting in the output of excellent room temperature and low temperature toughness of the special particle sanitation bucket, can be directly injection molding production of sanitation bucket.