With the rapid development of animal husbandry,the treatment and resource utilization of pig manure have become the focus of environmental protection.Among them,the problem of heavy metal pollution in pig manure is particularly prominent.This paper reviews the research status of heavy metal treatment technologies in pig manure,including the progress of physical methods,chemical methods and biological methods,and discusses the future development trend of heavy metal treatment technologies to provide theoretical support and practical guidance for the effective treatment of heavy metals in pig manure.