The invention relates to a microwave oven automatic production line, comprising a support; the support is provided with an assembly line, and the assembly line is sequentially provided with a transformer mounting device, a control box mounting device, a fan mounting device, a magnetron mounting device, a light bulb mounting device and a temperature controller mounting device from front to back; and a material conveying device for automatically conveying a transformer, a fan, a magnetron and a light bulb is arranged besides the support. The technical solution has the advantages of high efficiency, cost saving, simple structure, and the like.