The embodiment of the invention discloses a flexible automobile radiator system comprising an upper supporting board, a lower supporting board, an external left supporting framework, an external right supporting framework, a core body, an upper main piece and a lower main piece. The upper main piece is arranged between the core body and an upper water chamber. The lower main piece is arranged between the core body and a lower water chamber. Reinforcing plates are arranged at the left side and right side of the core body. The reinforcing plates are in a variable cross-section structure. The middle thickness of the reinforcing plates is more than the edge thickness of the reinforcing plates. Each reinforcing plate is provided with flexible grooves which transversely extend, pass through thethickness direction of the reinforcing plate and are symmetrical to the middle point of the reinforcing plate. Each one of the upper main piece and the lower main piece comprises a left piece and a right piece. The inner ends of the left and right pieces are fixedly connected. The flexible automobile radiator system provided by the invention limits the distortion flexibility of the core body on the premise of ensuring the structure stability of the flexible automobile radiator system, so that the flexible automobile radiator system has the advantages of higher anti-vibration strength and longer service life.