In the seismic exploration,it is difficult for the seismic wave to transmit the shielding layer of high velocity,so it is difficult to acquire efficient seismic data of reflected wave from the stratum below the high velocity shield layer by the conventional methods.According to Snell law and Zoeppritz equation,the paper studies the rule of energy’s distribution of elastic wave on the interface,obtain the rule of received energy variation with offset or angle,and also study the relation of the exploding.