Assembly structure of automobile seat beam

Provided is an assembly structure of an automobile seat beam, including a seat beam body and a seat installing plate fixed on the seat beam body. The cross section of the seat beam body is in the structure a U-shaped groove, the two sides of the seat beam body are provided with flanging structures, the two ends of the seat beam body are provided with overlapping structures in the sheet metal connection with the lower bottom plate of a vehicle body, the flanging structures and the overlapping structures are smoothly connected into one body, an opening structure is arranged in the middle, and a bolt is arranged on the seat installing plate through projection welding. The assembly structure reduces the stress concentration at the opening while increasing the welding joints of the seat beam body, so that the strength of the seat beam body is enhanced. The projection welding bolt reduces the welding positioning holes on the seat beam body, so that the punching procedures are reduced, the strength of the seat beam body is enhanced, and the collision effect of an automobile is improved. The assembly structure provided can be widely applied to the field of automobile seat beams.