The invention relates to a casting foundry process. The casting foundry process comprises the following steps: (S1) shell model manufacturing: refractory mortar precoated sand is combined with a shell model mold to manufacture an upper half shell model and a lower half shell model; (S2) shell model combination: the upper half shell model and the lower half shell model are combined and vertically clamped to form a pouring cavity; (S3) a pouring system is set, and includes a runner module arranged in the shell model molding cavity and a side surface runner module bonded on the shell model molding cavity; (S4) the smelting and the pouring are performed; and (5) the casting cleaning includes cutting, rough grinding and finish grinding.