The invention relates to a method for constructing a single-point mooring buoy chain stopper base, which sequentially comprises the steps of manufacturing components of a chain stopper base, mountingof each component, heat treatment and machining of each component, wherein the mounting of each component comprises a mounting of a base plate and an installation of a hook plate. The mounting of thebase plate consists of a base plate positioning part, a primary deformation prevention treatment part and a base plate welding part in sequence; the hook plate mounting comprises a hook plate positioning part, a secondary deformation prevention treatment part and a hook plate welding part in sequence. In the heat treatment step, two heat treatment processes are adopted, and the primary anti-deformation treatment and the secondary anti-deformation treatment are eliminated between the two heat treatment processes. The construction method of a single-point mooring buoy chain stopper base has theadvantages of reducing the machining cost, effectively eliminating the welding seam stress, stabilizing the shape and the size of the component structure and improving the subsequent welding precision.