In order to evaluate the flight safety of the new powered light aircraft, based on the concept and method of airworthiness certification of civil aircraft, the key flight stages are selected, and the take-off ground roll and take-off climb performance of the aircraft are simulated with Matlab Software Calculate glide distance and climb rate. The results show that the take-off taxiing distance of the hybrid light aircraft is reduced by 10% , the climbing performance is improved by 22% , and the adaptability of the hybrid light aircraft to the altitude and temperature environment of the take-off airport is also improved. This method can be used as a method to verify that the take-off performance of hybrid light aircraft meets the requirements of clause 23.211 5 and clause 23.212 0 of the regulations of CCAR-23-R4 of CAAC.