Motivated by the great lack of different blood types in the medical field, this paper mainly considers the inventory management model of blood ordering when the demand fluctuates positively with time, and compares three different inventory ordering strategies: when the information is not shared, each hospital department orders the blood separately; each hospital orders uniformly and centrally and all hospitals jointly order after adopting RFID technology. We focus the analysis on blood inventory cost, ordering cost, RFID technology investment cost and blood deterioration rate. The method of combining quantitative model with qualitative analysis is adopted in this paper to research and analyze the inventory control problem of blood supply chain, striving to form a relatively complete set of blood inventory theoretical frame and theoretical model so as to provide effective decision-making advices for the systematical management of blood.