Through concentration and uniform foundation under the force of additional stress calculation, the influence of depth and horizontal distance on additional stress of the ground was analyzed under concentrated force. The additional stress distribution of the rectangle area under uniform load additional soil at different locations was calculated. The results showed that the foundation soil under concentrated force of the additional stress there is a maximum, when uniformly distributed load the additional stress of the points in the area of a rectangle decrease with depth increasing, the additional stress of points outside the rectangle area increase which there is exist maximum with depth .