Abstract: It was seen that the biomass carbonization technology laged behind basic research. In this paper,the properties of biomass were studied at first.Then,the biochar mechanism was analyzed.After that,the research progresses of biochar manufacturing technique and equipment were mainly reviewed.It indicated that the raw material,pretreatment methods and technique parameters were three main influence factors on the yield of biochar.And the advantages and disadvantages of kiln carbonization,fixed bed carbonization,spiral carbonization,microwave carbonization and fluidized carbonization were compared to guide for the future research.