Objective To investigate the compatible stability of cefoselis sulfate mixed with different kinds of transfusions(5％ fructose injection + cefoselis sulfate,fructose sodium chloride injection + cefoselis sufate and invert sugar injection + cefoselis sulfate).Methods At 30℃,the above different mixed solutions' appearance and pH changes within six hours were observed,and determine the concentration of cefoselis sulfate by HPLC.Results There were noobvious changes concern to the concentration,pH and appearance in the mixed solutions.Conclusion At 30℃,different cefoselis sulfate mixed injection all have good compatible stability within 6 hours.