The invention provides a manufacturing method for C-shaped section ring forging of a 2219 aluminum alloy. The manufacturing method for C-shaped section ring forging of the 2219 aluminum alloy comprises sawing; quenching treatment, upsetting, punching, carrying out mandrel support reaming hole to obtain a rectangular ring blank; and manufacturing a profile ring blank and manufacturing a forge piece. According to the manufacturing method, the 2219 aluminum alloy profile ring piece is produced, due to the appearance of the forge piece is closer to the part, a flow line of the forge piece can be kept even more complete, and the subsequent machining allowance is small, so that the machining period is short, and the material utilization rate is high, moreover, the ring part is a complete circular ring, internal tissues are uniform, so welding is not needed, and therefore the problem of tissue difference and deformation of plate curl welding is solved; and meanwhile, by adding the quenching and tempering treatment, the tensile strength in room temperature and the brinell hardness are increased.