For the rubble mound breakwater in deep water,the influence of the property of the core stone on the wave propagation is studied using regular waves in physical experiments.Without overtopping,the relations between the transmission coefficient of the rubble mound breakwater,the period and height of the incident wave,and the weight distribution of the core stone are discussed.An empirical formula of transmission coefficient in function of dimensionless parameters Hi/d,gT2/d and B/D50 are fitted,which provide reference for breakwater construction and scientific research.