The invention relates to a car luggage rack arc bending machine, belonging to the technical field of car component machining equipment. The car luggage rack arc bending machine comprises a machine frame, a main machine, a mold assembly, a machine head assembly, an electrical control component and an oil cylinder control system, wherein the main machine comprises a front wall plate, a rear wall plate, a left rotary shaft, a right rotary shaft, a left core leading oil cylinder, a right core leading oil cylinder, a left swing arm, a right swing arm, a bending oil cylinder, a fixing plate, a swinging block, a left workpiece bending regulation component and a right workpiece bending regulation component; the swinging block is transversely arranged at a lower position between the front wall plate and the rear wall plate, the bending oil cylinder is fixedly arranged at the middle position of the swinging block, the fixing plate is arranged above the bending oil cylinder, and the middle of the fixing plate is fixedly connected with the upper end of the bending oil cylinder; the mold assembly comprises an upper mold, a bottom mold, two mold clamping plates, a mold clamping bottom plate and an upper pressing plate; included angles between the lower parts of the left and right swing arms and the workpiece bending regulation components are respectively alpha; the machine head assembly comprises an upper oil cylinder. The car luggage rack arc bending machine has the beneficial effects that relatively-large products do not need to be subjected to segmented machining, the rate of qualified products reaches up to 98%, the production efficiency is increased by 5 times, and the surface of a product is free from scratch marks.