A wheel hub molding and casting die, comprising: a casting die shell, a supporting bottom plate, a limiting bottom plate, a lifting module, a module supporting plate, a lower die, an upper die and removable plates, wherein the supporting bottom plate is tightly mounted on the lower surface of the casting die shell; the limiting bottom plate is arranged below the supporting bottom plate, and is adapted to support and limit the casting die shell and the supporting bottom plate; a molding cavity is formed in the middle part of the upper surface of the casting die shell; the lower end of the lifting module is mounted at the middle position of the bottom of the molding cavity; the upper end of the lifting module is mounted at the middle part of the lower surface of the module supporting plate; the module supporting plate is movably arranged in the molding cavity; and the lifting module is adapted to push the module supporting plate to move; both the lower die and the upper die are of detachable structures; the lower die is mounted at the middle part of the upper surface of the module supporting plate; the upper die is arranged so as to be sleeved on the outer side of the lower die; the outer wall of the lower die and the inner wall of the upper die are closed to form a pouring cavity; a plurality of pouring holes passing through the pouring cavity are formed in the upper surface of the upper die; and annular slots are formed in the outer side wall of the upper die; a plurality of removable plate slots communicating with the molding cavity are formed in the upper surface of the casting die shell; the removable plates are arranged on the removable plate slots in such a way that - the removable plates are adapted to be moved and limited at the outer ends of the removable plate slots, wherein the end parts of the removable plates do not extend into the molding cavity; and - the removable plates are adapted to be moved to enable one end of each of the removable plates to get close to the upper die till the end part of the one end of the removable plate is clamped in the annular slot, wherein the removable plates are fitted with the annular slots, and are adapted to remove and take out the upper die after the pouring is completed. the supporting bottom plate is tightly mounted on the lower surface of the casting die shell; the limiting bottom plate is arranged below the supporting bottom plate, and is adapted to support and limit the casting die shell and the supporting bottom plate; a molding cavity is formed in the middle part of the upper surface of the casting die shell; the lower end of the lifting module is mounted at the middle position of the bottom of the molding cavity; the upper end of the lifting module is mounted at the middle part of the lower surface of the module supporting plate; the module supporting plate is movably arranged in the molding cavity; and the lifting module is adapted to push the module supporting plate to move; both the lower die and the upper die are of detachable structures; the lower die is mounted at the middle part of the upper surface of the module supporting plate; the upper die is arranged so as to be sleeved on the outer side of the lower die; the outer wall of the lower die and the inner wall of the upper die are closed to form a pouring cavity; a plurality of pouring holes passing through the pouring cavity are formed in the upper surface of the upper die; and annular slots are formed in the outer side wall of the upper die; a plurality of removable plate slots communicating with the molding cavity are formed in the upper surface of the casting die shell; the removable plates are arranged on the removable plate slots in such a way that - the removable plates are adapted to be moved and limited at the outer ends of the removable plate slots, wherein the end parts of the removable plates do not extend into the molding cavity; and - the removable plates are adapted to be moved to enable one end of each of the removable plates to get close to the upper die till the end part of the one end of the removable plate is clamped in the annular slot, wherein the removable plates are fitted with the annular slots, and are adapted to remove and take out the upper die after the pouring is completed. - the removable plates are adapted to be moved and limited at the outer ends of the removable plate slots, wherein the end parts of the removable plates do not extend into the molding cavity; and - the removable plates are adapted to be moved to enable one end of each of the removable plates to get close to the upper die till the end part of the one end of the removable plate is clamped in the annular slot, wherein the removable plates are fitted with the annular slots, and are adapted to remove and take out the upper die after the pouring is completed.