Abstract: On the basis of the surface movement observation data of 1501 working face in Xinlong Coal Mine, the influence of fully-mechanized top coal caving on the parameters of surface movement and deformation, surface correlation angle parameters and dynamic parameters are studied under the condition of thick unconsolidated layers. It was concluded that, compared to general mining geological conditions, the surface subsidence coefficient, horizontal movement coefficient and maximum coefficient of subsidence caused by fully mechanized caving mining are more larger under the thick unconsolidated layers, is 0.86, 0.75 and 17.53, respectively; the active stage and decline stage are longer, and the ratio of the total moving time is 58.0% and 37.2%, the ratio of the stage subsidence to the total subsidence is 97.6% and 2.0%. It shows that the surface will be in a long moving period, and the surface stability will take a long time under the mining of thick unconsolidated layers.