Chitin,a natural polymer of N-acetyl-D-glucosamine is exceeded in abundance only by the biopolymer cellulose.Chitin and its derivatives hold great economic value because of their versatile carbon and nitrogen contents and agrochemical applications.In this review,the development on the chitinolytic microorganisms,microbial fertilizers by chitionlytic microorganisms and their biological activities were discussed.As well as,their applications in modern agriculture was introduced and its’ future was prospected.