Objective To explore the effects of needle retractable syringe.Methods 400 patients undergoing injection treatment were randomly divided into the experiment group and the control group in equal number.The conventional syringe was used in the control group and the needle retractable syringe was adopted.The pains in the patients,time for puncturing and incidence of puncturing-induced injuries were compared between two groups.Result The pains,time for puncturing and incidence of puncturing-induced injuries in the observation group were all significantly lower than those of the control group(all P < 0.05). Conclusion Needle retractable syringes may help to alleviate the pain,reduce the workload of nurses and lower the incidence of needle stick injuries.