A survey of adjacent buildings pounding damage caused by the Lushan earthquake is presented in this paper. Used the acceleration records from Lushan earthquake, the seismic response of adjacent buildings considering collision is calculated, and the influence of seismic joint width and building mass to the collision process is analyzed. Conclusions are as follows: the wider the seismic joint between adjacent buildings, the less and slighter the pounding; there is little effect of ground motion direction on the collision damage between adjacent buildings; the influence of pounding to the building seismic response become slight with the increase of building mass, and the influence is larger to the lighter building; analysis results about adjacent buildings collision in this paper are in conformity with the typical pounding damage example.