According to the characteristics of cuttering clay,the section shape of cutterhead arm is optimized,the 3D model of cutterhead is established,and the stress and deformation of cutter at maximum power are analyzed.In order to meet the rigidity and strength requirements of the cutterhead,high strength and high toughness alloy steel material is adopted,and the manufacturing and welding process of cutterhead is optimized.The application of real ship shows that under the same working conditions,the power of the high-efficiency clay cutterhead is reduced by about 14.3% compared with the traditional clay cutterhead,which verifies the rationality and advancement of the high-efficiency clay cutterhead design.