The invention provides a core box mold of a ZM bearing seat. The core box mold of the ZM bearing seat comprises a sand seat mold and a sand cover mold. A sand shell can be manufactured through the sand seat mold, wherein the shape of the sand shell is the same with the shape of the exterior of a base of the bearing seat. A sand shell can be manufactured through the sand cover mold, wherein the shape of the sand shell is the same with the shape of an upper cover of the bearing seat. The sand seat mold comprises a sand seat upper mold and a sand seat lower mold. The sand cover mold comprises a sand cover upper mold and a sand cover lower mold. Five sand shooting openings are formed in the lower sides of the sand seat lower mold and the sand cover lower mold. Air exhausting troughs are formed in the other three sides of the sand seat lower mold and the other three sides of the sand cover lower mold. The core box mold of the ZM bearing seat has the beneficial effects that according to the core box mold of the ZM bearing seat, mechanical machining of the manufactured bearing seat can be reduced, the cost of materials and manual work is saved, and automated production is easy to achieve.