To evaluate the reliability of Yin Zhihuang injection by testing the muscle stimulation, vessel stimulation, hypersensitivity of total boby and haemolytic test . Methods:In the muscle stimulation test , two rabbits were observed at 48 hours after Yin Zhihuang injection; in the vessel stimulation, three rabbits were observed at 5 days afer Yin Zhihuang injection or saline, respectively ; in hypersensitivity of total boby, 6 guinea pigs were injected by Yin Zhihuang in abdominal cavity in 3 times, t he last two were 14d and 21 after first medication; in the haemolytic test, hemolysis and coagulation were mainly observed .Results:The Yin Zhihuang injection has no stimulation to muscle and ear vein of rabbit, the rabbits have no alergic reaction as contrast and without hemolytic reaction .Conclusion:Yin Zhihuang injection was safety and reliable based on the animal experiment .