The quality stability and pharmacodynamics of cisatracurium besilate for injection at different temperature, time and storage conditions were investigated.The related substances were investigated at 2∼10 degrees, 25 degrees, 35 degrees and 40 degrees.The pharmacodynamics of cisatracurium besilate for injection which was stored at 2∼10 degrees and 25 degrees for 30d were detected.There was no effect on related substance at room temperatureThere was no significant difference between room and low temperature