The invention belongs to the field of high-temperature hot water circulating pumps, and discloses a high-temperature hot water circulating pump suspension body based on heat pipe cooling. The high-temperature hot water circulating pump suspension body based on heat pipe cooling comprises a suspension body, a pump spindle, a shaft sleeve, a guide bearing, a plurality of first heat pipes, a cavity and a second heat pipe; the suspension body is provided with a first flange disc, one ends of the first heat pipes penetrate the periphery of the first flange plate to be evenly arranged, the heat dissipation amount of the suspension body is enhanced, and the temperature of the suspension body is reduced; the cavity is formed in the thick portion of the right side wall of the first flange plate, is annular, and is filled with inert gases, through the arrangement, metal on the periphery of the cavity is evenly and linearly expanded, and the phenomenon of heat stress concentration is avoided; the cavity is formed in the thick part of the right side wall of the first flange plate, and heat dissipation of the suspension body is enhanced; and long-term stable running of a hot water circulating pump is ensured, the potential problems that the amount of external cooling water is insufficient, and a cooling pipeline is blocked are solved, meanwhile, water resources are saved to a certain degree, the production cost is saved, and the highest temperature of medium conveying is improved.