Abstract：As a geological body，rock is considered as discontinuity. The mechanism of block deformation and movement is studied firstly. Theoretical methods to calculate the block deformation and movement are summarized by introducing theoretical calculating model. Secondly，the basic rules of block deformation and movement under explosion loads are studied by numerical simulation；and the process of block deformation and movement is shown. At last，the effects of correlative parameters are discussed. These parameters include the distance from explosion center，the thickness of interlayer and the strength characteristic of filler in the fault.
