One of the most important content of the green chemistry research is the preparation of furfural and 5-hydroxymethylfurfural(5-HMF),which uses the biomass resources as the raw materials.Because of the active aldehyde group of furfural,it has been used in leather manufacture for a long time.In this paper,the preparation and development of furfural and 5-HMF are reviewed.The furfural tannage are summarized,and at the same time,the modification and the outlook of furfural and the 5-HMF used as tanning agents are prospected.