[Abstract] Objective: To explore the application value of staged injury control in the emergency treatment of patients with lower extremity injury in orthopaedics department. Methods: 116 patients with lower extremity injury were divided into two groups by the different emergency methods: the control group (n=52) received routine emergency treatment, and the study group (n=64) received staged treatment according to the injury control theory. The success rate, time of first aid, incidence of complications and recovery of lower limb function were compared between two groups. Results: The rescue success rate of the study group was significantly higher than that of the control group (96.88% vs 86.54%, P<0.05). The emergency time, ICU days and average hospitalization time of the patients in the study group were significantly shorter than control group (P<0.05), and there was no significant difference in the amount of bleeding between the two groups (P>0.05). One month after emergency treatment, the muscle strength, flexion and extension of the study group were significantly higher than control group, and the incidence of knee joint stiffness, local swelling and local blister were lower (P<0.05). The total incidence of complications in the study group was significantly lower than control group (4.69% vs 17.31%), and the total satisfaction rate of family members with first aid was significantly higher (98.44% vs 86.54%, P<0.05). Conclusion: Staged injury control can effectively control the injury, shorten the emergency time, improve the emergency success rate of patients with lower extremity injury, and promote the recovery of lower extremity function.