In order to assure the transport airworthiness of large rubber container, the design of the landing impact test system was carried out according to the Civil Aviation Administration of China on the emergency landing overload requirements for transport category aircraft. The impact platform was simulated and verificated, the waveform generator was simulated and designed, the pendulum system and guiding mechanism were designed, while the landing impact test system was constructed. The payload reaches nearly 20 t, and the maximum impact load reaches 400 t. The large rubber container was selected as a typical air cargo for emergency landing test verification. The results show that the waveform of the impact test is approximately triangular wave, which is simular to the waveform of the simulation curve. The overload peak is 1.54g laterally and 3.06g, 9.02g, 16.20g heading respectively. The maximum error with the target peak is less than 3%, and the corresponding time of the peak is more than 50 ms. The test system meets the design requirements. The system will be used for the development of airlift platform,which is great significance to ensure flight safety, reduce development risk and improve the airworthiness of airlift platform.