The invention discloses a motor casing structure with material saving, which comprises a casing main body (1). The casing main body (1) is provided with a thin wall, and is provided with a yoke embedding sleeve (2) which is tightly matched with the casing main body (2). The yoke embedding sleeve (2) is provided with a positioning boss (3) and magnetic shoe clamping edges (4) for fixing a magneticshoe.