In the fire control system of the auxiliary facilities of the comprehensive utility tunnel, the point-type photoelectric smoke detector used at present is susceptible to the wet conditions in the utility tunnel resulting to frequent failure or damage, which has certain safety risks, and the frequent maintenance and replacement of equipment also increase the operation and maintenance management cost of the utility tunnel. In order to explore and solve the problems of equipment maintenance, frequent replacement and detector failure, this project builds a fire environment in the pipe tunnel for simulation test. By comparing the test results of point-type photoelectric smoke fire detector and image fire detector, the application advantages of image fire detection technology in the pipe tunnel are analyzed.