Polishing robot for automobile frame

The invention provides a polishing robot for an automobile frame, and belongs to the field of automobiles. The polishing robot comprises a box body; two polishing mechanisms respectively arranged at the two sides of the box body; the polishing mechanisms comprise two parallel spaced vertical plates; two first connecting plates are installed at intervals on one end of the vertical plates, and two second connecting plates are installed at intervals on the other end of the vertical plates; a first rotating rod is rotatably connected between the two first connecting plates, and a second rotating rod is rotatably connected between the two second connecting plates; a guide rotating roller is fixedly arranged on the first rotating rod in a sleeving mode; an active rotating roller and first gearsare fixedly arranged on the second rotating rod at intervals in a sleeving mode; the guide rotating roller is located above the active rotating roller, and a polishing abrasive belt is arranged between the active rotating rol