Flight load design is an important part of aircraft design. It is a bridge connecting the General&Aerodynamic and Structure&Stress. In this paper, the development of flight load design is reviewed in terms of the specifications to be followed, the design methods, and the verification of flight load, especially focuses on the design methods, the selection of severe case and the verification method, and summarizes the advantages and disadvantages of existing design verification methods, and The development direction in the future are carried on.