The research on the requirements of anti-submarine decision aid system for shipborne helicopter is conducted from three aspects of military requirements, mission requirements and system function requirements. It is believed that military requirements should satisfy the needs of the crew to master the marine environment and equipment performance and develop programs, and mission requirements should satisfy the needs of multi-type anti-submarine missions, multi-type combat processes and coordinated command.The systems engineering analysis method is applied, and according to the operational process of the shipboard anti-submarine helicopter, the functions of the anti-submarine decision aid system are mainly divided into four aspects, that is, information processing guarantee, anti-submarine data support and program management, task planning and system management.Based on this, the various functions are decomposed in detail.The study has certain reference value for the design of the airborne anti-submarine decision aid system.