objective reason analysis of pharmacy errors and preventive measures, improve the quality of pharmacy services. Methods through long-term observation and record the error reason, put forward coping strategies. Results the staff responsibility heart is not strong or poor mental state, the lack of professional knowledge and service level; not strictly fulfil the audit system; drug put unreasonable and so on, are the main causes of errors. Conclusion strengthen professional knowledge, improve professional ability; perfect the rules and regulations, strict examination, to maximize the prevention of errors.