Abstract: In college chemical laboratory,students and teachers use a lot of chemical reagent in experiment teaching and research,which include strong corrosive acid and base,poisonous heavy metal salts and organic compounds. If we discard all of waste above without being disposed properly,they will damage the network of drains in the first and destroy the water resource and ecosystem in the second. Its important to handle the liquid waste properly in lab. This paper discusses the methods of disposing common liquid waste (acid,base,and heavy metal salts) in foundation chemistry laboratory