The utility model discloses a molding mold of a flat ferrite magnetic core, which comprises a cavity, an upper mold, and a lower mold consisting of an intermediate push rod and a side push rod. Blank members are arranged in the cavity; the corresponding blank members of the cavity are two products which are back to back and connected with each other; and the intermediate push rod and the side push rod are provided with grooves for cutting the corresponding blank members. By the molding mold of the flat ferrite magnetic core, the problems that the flat ferrite magnetic core is easy to deform and has a large dimensional tolerance are solved; the molding operation is simple; the grinding processing is convenient; the reliability is high; and the production capacity of a single press is improved.