Mountainous areas are the regions where downburst often occurs. In order to study the wind field characteristics of continuous mountains under the downburst, the influence of height, distance and other geomorphic elements on the wind field of the characteristic position was analyzed by Large Eddy Simulation (LES). The results show that when the height of the mountain was greater than 50 m, the radial extreme wind speed at the foot of the mountain and the crest gradually reduced as the height of the mountain increasesd. The speed-up effect at the crest was significantly affected by mountain height，and the acceleration factor was larger near the ground，while the acceleration effect was larger in the upper space at the foot of mountain. For the two mountains, the rear mountain had less effect on the turbulence intensity of the front mountain, but the turbulence of the rear mountain ranges increased firstly and then decreased with the augment of the mountain distance and augmented gradually with the height increases of the front mountain.