Abstract: Based on the impact experiments on saturation cement samples in water,the velocity of elastic wave,porosity and permeability of samples were measured.The linear relation between the exploding wave pressure and the square of velocity of elastic wave was obtained by using dimensional analysis,the relation between the velocity of elastic wave and the fracture porosity was obtained through empirical equations,and the formula for permeability and porosity of fracture was obtained by means of model simplification.The effect of exploding waves on enhancement of fracture permeability was obtained and the optimum exploding loading was determined.