The invention discloses a heat treatment method of a
thorium-based fused salt main container and a
core shroud. The method comprises the following steps of S1, heat treatment of the main container, specifically, the main container is of a vertical structure to be subjected to heat treatment, a bottom board is a
carbon steel or low-
alloy steel thick board and horizontally arranged on a furnace bodybearing point inside the furnace, and a placement plane of the main controller is provided; and S2, heat treatment of the
core shroud, specifically, the
core shroud is of a vertical structure to be subjected to heat treatment, the bottom board and a partition board are horizontally arranged on the furnace body bearing point inside the furnace, and a placement plane and an
isolation effect of thecore shroud are provided. By the adoption of the heat treatment method of the
thorium-based fused salt main container and the core shroud, the precision requirements for size changes in the heat treatment process of equipment can be effectively ensured, the heat treatment cost is reduced, the equipment which is subjected to heat treatment and is good in performance, stable in quality and high in precision is obtained, the manufacturing requirements of the
thorium-based fused salt main container and the core shroud are met, and the service life of the equipment is prolonged.