Abstract: Taking measured data of surface movement deformation observatory in Yangmei Group three mining area 15^# coal 8303 working face as base, the effect of slippage caused by underground mining on the basis of probability integration method is analyzed. The article analyzed the effect of slippage on mountain surface movement parameters and surface movement deformation state. With the simulation for the reference, the article got the expected surface movement deformation parameters of probability integration method; through the comparison and analysis in tendency B and C line, the mining slippage characteristics of different terrain features in the mountain region are concluded. The results are drawn as follows. Mining slippage is inevitable due to the impact of mining subsidence in mountainous; the greater of terrain ups and downs, the more of obvious mining slippage on the influence of horizontal movement and horizontal deformation, at the same time, the greater of curve fluctuations of horizontal movement and horizontal deformation.