Automatic steel door panel production line employs robotic arm for automatic feeding and utilizes the NCM-660 door panel roll forming machine for shaping. It achieves alternate forming of the lock side/hinge side frames. Hydraulic flanging is employed for shaping the top and bottom ends. The steel door panel production line can be customized according to process requirements. When selecting the multi-head punching machine for punching, extruded hole forming can be performed simultaneously. When opting for laser cutting, the metal door manufacturing line does not require molds and can customize hole positions as needed.