The construction of applied universities has entered a new era and needs to meet higher development requirements."Traffic Accident Scene Investigation"is one of the applied courses of Shanxi Police College.This article takes the teaching of this course as an example to explore the problems in the quality of course teaching under the background of the"learning war combination"teaching mode.It proposes to improve the practical construction level of the"traffic accident scene investigation"course by improving the course setting,optimizing the course content,and deepening the ideological and political education of the course,in order to provide reference for the course construction of public security colleges and applied universities in various regions.