Cast iron platform with fixing structure

The utility model belongs to the technical field of cast iron platforms, and discloses a cast iron platform with a fixing structure, which comprises a platform body and a supporting seat at the bottom of the platform body, a clamping device is mounted on the platform body, and through grooves are formed in the middles of four edges of the top of the platform body. Each clamping device comprises a mounting block mounted on the inner side of the corresponding through groove in a liftable mode, an air cylinder mounted in the corresponding mounting block and a push plate connected to the movable end of the corresponding air cylinder, and a sweeping mechanism is mounted on one side of the platform body. The cleaning mechanism comprises a movable supporting plate, two linear motors installed on one side wall of the supporting plate, an installation plate installed at the bottoms of the two linear motors in a sliding mode and bristles connected to the bottom of the installation plate. The machining stability of the