本文考虑到在冲撞过程中汽车和护栏共同变形的影响,建立了汽车-钢筋混凝土护栏的连续系统的计算模型,用Runge-Kutta法求解运动方程,由计算机仿真模拟汽车冲撞护栏的全过程,给出了汽车运行轨迹、车体转角、减加速度以及护栏受到的冲击力等值. In this paper, considering the impact of the common deformation of the car and the guardrail during the collision, the calculation model of the continuous system of the car-reinforced concrete guardrail is established. The equations of motion are solved by the Runge-Kutta method. The whole process of the car crashing the guardrail is simulated by computer simulation. Out of the car running track, the body corner, reducing the speed and the barrier suffered the impact of equivalent.