Auxiliary frame formed by mixing extruded aluminum and cast aluminum alloy

The utility model provides an auxiliary frame formed by mixing extruded aluminum and cast aluminum alloy, which is characterized in that integrated brackets are arranged at two ends of a front cross beam, each integrated bracket is connected with one end of a longitudinal beam, and the other ends of the two longitudinal beams are connected with a casting; an opening is formed in the middle of the casting, a rear beam is arranged in the opening, and the two ends of the rear beam are connected with the casting. The integrated support comprises a connecting block, the connecting block is sequentially provided with a first frame and a second frame rightwards, and a third frame is arranged below the first frame. Through the combination of different aluminum alloys, the front-end vehicle body mounting points and the front suspension mounting points adopt an integrated extrusion structure, so that the structure is simple, and the cost is low; a complex section is adopted in the first frame, a complex structure is ac