The invention discloses an automatic production line for rolling of an automobile plate spring. A heating device, a high-pressure water dephosphorization device, a rolling device, an end machining device, a heat straightening device, a transferring and combining device, another heating device, another high-pressure water dephosphorization device, another rolling device, another end machining device, another heat straightening device and an automatic discharging device are disposed behind an automatic feeding device in sequence and all the components are connected to an electric control system finally. According to the automatic production line for rolling of the automobile plate spring, by means of layout design, process combination design of stations for feeding, dephosphorization, end machining, heat straightening, transverse transferring and combination, discharging and the like is performed so as to form the full-automatic automobile plate spring rolling line; the effect that on-line rolling of two heads of the automobile plate spring is finished is achieved; the time of product switching and mold adjusting due to cooling and the action of putting products on the line again is saved; the production period is shortened by two or more shifts; machining of the two heads is achieved at the same time, and thus the number of work-in-progress products of the rolling processes is greatly decreased by over 50%; due to automatic operation of the whole course, the labor intensity of operators is substantially relieved; and workload of eight persons can be finished only by two persons.