Numerical analysis of the dynamic response for rock-soil mass slope under different traffic loads is made, using numerical analysis of geoteehnical software FLAC2D6.0. The result indicates that under traffic loads, the vibration acceleration of rock-soil mass near seismic source is the maximum, up along slope or inner slope in horizontal direction it decreases gradually. Near seismic source , the vibration at- tenuation is more intense, and it gets more weak as distance increases. The heavier the traffic load is the bigger the attenuating range is. Above the road the vertieal acceleration and the horizontal acceleration in slope are in same magnitude, and the vertical one is bigger than the horizontal one. The magnitude below the road is bigger than one above the road, the vertical acceleration and the horizontal acceleration are in same magnitude, and the horizontal one is bigger than the vertical one also. The results have some theo- retical significance and project application for evaluating the influence acting of traffic loads on rock-soil mass slope and considering how to reinforce and govern the slope under traffic loads.