Abstract: In this paper,a description was made of the performance and basic data of H-125 helicopter,and the relevant performance characteristics of main helicopters were analyzed and compared in forest aviation fire prevention, and the advantages and disadvantages of this model were found out in forest fire prevention. In view of the practice of aviation forest protection in the northwest plateau area of Sichuan in recent years, relevant improvement research has been carried out to better exert the role of H-125 helicopter in forest fire prevention in the region.