On the study of wave distribution in shallow water near the shore，Grukhovsky gives an empirical wave height distribution formula from deep-water to the entire shallow water area（η＞2），but the applicability study of the formula after wave breaking is lacking. Based on FLOW-3D software，we carry out a simulation of deep-water irregular wave propagating to slope topography breaking area，verify the consistency between the wave height distribution along the path with the test value，and simulate the change of wave height distribution along the way when the wave propagates from the finite water depth to the near shore breaking area under the condition of slope topography of 1∶30. The results show that under the condition of this slope and the relative water depth η＜2.75，there is a large error and the empirical formula is inapplicable. The ratio of each cumulative rate wave height to the average wave height in the breaking area shows a decreasing trend as the relative water depth becomes smaller. The values of the empirical formula compare with the numerical experiment values，these of the big wave are larger and these of the wavelet are smaller.