The invention relates to a high-temperature
molten salt pump. A main shaft is arranged in the pump from top to bottom in a penetrating manner, a suction cover is arranged at the bottom of the pump, adischarging body is arranged at the upper portion of the suction cover, an
impeller is arranged in the center of the suction cover, guide vanes are arranged on the outer circle and the upper end of the
impeller, the bottom end of the discharging body is connected with the suction cover through bolts, and the top end of the discharging body is connected to a cylindrical
pipe through bolts; and theouter circles of the guide vanes are connected with the suction cover and an inner spigot of the discharging body in a matched manner, and a sliding bearing body is arranged above the discharging bodyand connected with the discharging body and the cylindrical
pipe through flanges. According to the high-temperature
molten salt pump, the manner of a liquid outlet
pipe is improved, a power seal is arranged above the liquid outlet pipe, gas is arranged between the power seal and a bottom plate,
thermal isolation of a high-temperature medium is achieved, and heat is directly conducted to the bottom plate and a support of the pump without high-temperature
molten salt; and the temperature of the shaft is guaranteed to have a reasonable
temperature drop gradient from the high-temperature end of the bottom plate to the bearing installation position, and stress deformation of the shaft due to sudden drop of the shaft temperature in a traditional cooling manner is avoided.