According to the model of the crashworthiness of caron the assembly simulation plane, the improving design of absorbing energy structure was provided which can improve the structure crashworthiness for front impact. And it was simulated with the computer. By contrast to the former simulation result and the result of impacting test for real car, the effectiveness of improving the structure crashworthiness by structure improvement for the front impact was validated. At last, the feasible way by which can improve the crashworthiness of vehicle structure was given.