The invention provides an automatic painting production line of power distribution cabinets, and belongs to the technical field of machinery. The automatic painting production line of the power distribution cabinets solves the problem of low processing efficiency in the prior art. The automatic painting production line of the power distribution cabinets includes a machine frame, and an annular guide rail is fixed to the machine frame. A feeding mechanism is arranged on the machine frame, and a painting device is further arranged on the machine frame. A drying device is arranged on the machineframe, and a discharge mechanism is further arranged on the machine frame. The annular guide rail penetrates through the painting device and the drying device, and a conveying mechanism capable of conveying distribution boxes is arranged on the annular guide rail. The automatic painting production line has the advantage of improving the processing efficiency.