In order to effectively reduce the incidence of expressway operation safety accidents, one should pay attention to expressway safety management, especially high slope maintenance and management. In conjunction, with the current situation of operation safety management of some expressways, many mountain expressways have high slope incidences from time to time, due to the extension of operating time, and inadequate maintenance management. Moreover, vehicle damage, and human death accidents caused by the high slope collapse, landslide, debris flow, and other disasters are often reported. Therefore, it is essential to strengthen the maintenance and management of high slope in the mountain expressways. This paper, will further elaborate the issues, which are related to the maintenance and management of high slopes in the in mountainous expressways.