Abstract: A test site for scour experiments under wave and current action is built based on a practical engineering,and a series of model tests are performed in which the model scales of 1∶40 and 1∶60 are adopted. The scour process and maximum scour depth induced by wave and current are investigated,and the scour characteristics are compared with current-only conditions. The maximum scour depth of the seabed around composite bucket foundation is determined according to the results of series of scale model tests. It is captured from the experiments that the scour under wave and current begins from the behind of the model,and the maximum scour depth also locates at the behind. When it reaches an equilibrium scour time,the seabed all around the foundation is scoured,which is different from the equilibrium scour topography induced by current-only. The maximum scour depth under wave plus current is about 2/3 of the maximum scour depth induced by current-only,and the position of the maximum scour depth moves downstream.