Double-ring type reinforcing structure of rear air window

The invention discloses a double-ring type reinforcing structure of a rear air window. The structure comprises a top cover supporting beam assembly, a vehicle body D column and a vehicle body lower framework, the top cover supporting beam assembly located at the tail portion of a vehicle, the vehicle body D column and the vehicle body lower framework located at the tail portion of the vehicle are fixed to form a first longitudinal annular structure, a second longitudinal annular structure is fixed to the first longitudinal annular structure, and rear windshield glass is bonded and fixed to the second longitudinal annular structure. According to the invention, the combination of the two longitudinal annular structures is adopted, a traditional installation structure of rear air window assembly glass and sheet metal parts is replaced, the visual area of a rear air window is greatly increased, and the viewing experience of passengers is improved. The peripheral structure of the rear air window is constructed by