Objective To explore the effect of Objective structured clinical examination (OSGE) training on theemergency ability of nurses in the operation room. Methods Medical cooperation OSGE training was taken for 36 junior nurses in operation room. We evaluated their undergo operation contingency ability, participation contingency ability and operation cooperation in 3 months before and after training. Results After the training, the junior nurses in medical care cooperation, rescue ability, equipment preparation, condition assessment, coping ability were significantly higher. Nurses′s in-place time, equipments in place time, puncture time were shortened. Cooperation satisfaction was improved significantly. Compared with that before training, the differences were statistically significant (P<0.05). Conclusion Medical cooperation OSGE training for junior nurses in operation room may improve undergo operation contingency ability, coping contingency ability and operation cooperation, reduce the risk of surgery.