Objective:To explore the application effect of modified early warning scoring system in treatment of patients with multiple injuries in emergency department.Methods:Using the convenient sampling method, a total of 126 patients with multiple injuries who were admitted to Emergency Department of Heping Hospital Affiliated to Changzhi Medical College from January 2018 to December 2019 were selected as the research objects. The patients were divided into the control group and the intervention group by chronological order , with 63 cases in each group. The control group was given the traditional multi-injury routine first aid and monitoring plan, while the intervention group applied a modified early warning scoring system on the basis of the control group. The success rate of first aid and the degree of deterioration of patients were compared between the two groups.Results:After the implementation of modified early warning scoring system, the success rate of first aid of patients in the intervention group was higher than that of the control group and the degree of disease deterioration was lower than that of the control group, and the differences were statistically significant ( P<0.05) . Conclusions:The modified early warning scoring system has a significant application effect in emergency patients with multiple injuries, which can improve the success rate of treatment of patients and reduce the degree of disease deterioration.