Based on the analysis of the mission requirements of helicopter field combat scenario, starting with the field blind landing mission in complex environment, this paper first analyzes the domestic and foreign solutions for helicopter landing site, then designs the search and sequencing method of helicopter landing landing sites based on safety constraints, and designs the route plan of blind landing Finally, the solution simulation of the guidance instruction is carried out, and the integrated verification of the comprehensive visual scene is carried out. The experiment shows that this technology is reasonable and effective, which can reduce the operating pressure of the aircrew, improve the operational efficiency and maneuverability of military helicopter in field battlefield, and lay a foundation for the further development of military helicopter.