The invention discloses an automatic riveting robot for steel pipes. The automatic riveting robot comprises a base, a second connecting rod bracket, a hydraulic cylinder bracket and a first connecting rod bracket and is characterized in that axle fixing bases are fixedly installed on the base; axles are installed on the axle fixing bases; wheels are installed on the axles; dead axle vertical plates are arranged on the base, a dead axle is fixedly installed on the dead axle vertical plates; the second connecting rod bracket is fixedly installed on the dead axle; and a second connecting rod is installed on the second connecting rod bracket in a hinged mode. According to the automatic riveting robot for the steel pipes, the steel pipes can be riveted from the interiors of the steel pipes, the automation degree is high, and the labor intensity is relieved.