In order to study the influence of wave action on the stability and wave suppression effect of hollow block dike,a series of flume experiments were carried out on the basis of the first phase project of channel regulation in the south channel of the Yangtze River estuary. The effects of different wave elements(wave height,period), water depths and structure combination modes on the structure stability,wave force and wave height before and after the structure of the hollow block dike were analyzed. There sults show that in the sub-merged state,the hollow block dike is mainly affected by the hydrodynamic pressure,and the shallower the test water depth,the greater the maximum wave force on the hollow block,and the better the wave suppression effect. The structure combination modehas little effect on the stability and wave suppression effect of the hollow block dike.The hollow blocks at different locations are subjected to different wave forces. The blocks on the side facing the wave receive the greatest wave force,the blocks on the back side of the wave receive medium wave force,and the blocks in the middle receive the least wave force. However,the wave force acting on the hollow blocks is small generally,which is beneficial to the local stability of the dike structure.