The invention relates to a cast molding method of rail traffic sleeve type castings. The cast molding method comprises five steps of raw material smelting, metamorphic modulation, casting ladle pretreatment, quenching and tempering casting and modified heat treatment. Compared with the prior art, according to the cast molding method, on the one hand, the recycling rate of scrap metal is increasedeffectively, meanwhile, the structure strength, toughness, heat-telescopic-resisting ability, anti-fatigue performance and abrasion-resisting property of the castings are also greatly improved, and the purpose of improving the using performance of the castings is realized accordingly; and on the other hand, the defects of stress concentration, cracks and sand holes in the castings can be effectively reduced, and the structural strength of the casting product quality is improved.