Abstract: Some treatment techniques of sewage which was polluted by heavy metals were analyzed and their defects were indicated.Biotreatment technique for heavy metals pollution was introduced.This technique will be a principal method in the future. It had lots of advantages，such as abundant raw material，high efficient，low cost，eco-friendly，non-pollution and so on.At the present stage，this technique remains in the laboratories.It need be further researches and development for applying to industry treatment about sewage which was polluted by heavy metals.