In a type of aircraft ejection test, the single-point concentrated load is large, due to factors such as test site conditions and test equipment capabilities, the existing loading method is difficult to meet the test concentrated large load loading requirements. Therefore, the test load size, direction, loading position, ground rail bearing capacity, loading device strength, weight, reduction load and other factors were comprehensively considered, and through multi-parameter target optimization, the best design size of single-point large-load loading device that met the test requirements was obtained. The optimized load device was developed to optimize the distribution of large loads through active heading load unloading and vertical load unloading interfaces to ensure the safety of the carrying system, and the precise application of concentrated large loads was realized. The designed single point centralized large load loading system had been successfully applied to the ejection load static test of a certain type of aircraft. The loading device remained stable during the test loading, no damage and visual deformation were found, the test data were consistent with the target value, and the test loading stability and repeatability were good.