In order to study the condition of large buried depth, thin bedrock with the increase of mining height are broken strata movement laws, the similar simulation research method was adopted to study the deep thin bedrock movement under the condition of working face of large mining height, and the results showed that the interval was reduced,  bending subsidence belt on the "three zones" of bending belt has gone; With the increase of mining height, affected by the excavation of strata movement range; Traditional fracture belt formula calculated the 6 m large mining fracture zone height, the result was small.