Airborne electronic hardware is assuming more and more system functions. Considering the cost, using COTS IP becomes a trend, which also brings challenges to airworthiness certification. The usage position and risk of COTS IP in airborne electronic hardware design are analyzed, and the current airworthiness certification requirements are studied. A suggested evaluation process is proposed based on the authority documents and certification experience, and the airworthiness certification elements are summarized. The research results are helpful to solve the airworthiness certification issues of COTS IP, and provide a reference for the existing airborne electronic hardware design assurance methods.