Abstract: To know the crashworthiness and mechanism of a single slope concrete barrier,safety performance is evaluated using finite element analysis and a full-scale impact test.The results indicate that the single slope concrete barrier is able to hold up to 400 kJ impact energy and all index meet the crashworthiness specification,when the impact conditions are that the bus weight is 14 t,velocity is 80 km/h,and impact angle is 20°.One crashworthiness mechanism of the single slope concrete barrier is that the impact makes the vehicle climb up and lean along the slope to absorb kinetic energy and increase impact time.Simulation results match those of tests and prove the feasibility of the barrier safety evaluation.This research provides data for single slope concrete barrier application in reality and is an example to evaluate barrier safety based on dynamic FEA method.