The invention discloses a universal support rod for automobile four-door paint spraying. The universal support rod comprises a support rod body and an adjustment bolt, wherein threshold clamping plates capable of clamping an automobile threshold are arranged on the support rod body; the support rod body is axially provided with an internal thread; and the adjustment bolt is in threaded connection with the support rod body. The universal support rod disclosed by the invention is not liable to be influenced by the structure difference of different automobile types, applicable to most of the existing automobile types, capable of freely adjusting the support angles of four doors with regard to different production fields, and applicable to most of coating production lines; therefore, the universal support rod is wide in application range, high in universality, simple in structure, convenient to install, and capable of saving production cost.