The utility model discloses a remote control type step voltage warning dolly, including a remote controller with lie in on the remote control automobile body controller rather than wireless connection, length adjustable structure around the remote control automobile body is, preceding chassis inwards is equipped with the slot, and back chassis inwards is equipped with the inserted bar, and the inserted bar slidable is pegged graft in the slot, be equipped with the fastener between its and the inserted bar on the slot, preceding chassis the place ahead is equipped with independent driving motor, around one of wheel be the metal wheel structure, metal wheel passes through wheel hub and is connected with the sliding ring, electric connection between the three, sliding ring pass through dead ring and axletree and insulate and be connected, the sliding ring is connected to the input of locating step voltage alarm on the remote control automobile body respectively through the remote control automobile body pop -up piece that is fixed in rather than sliding connection. The utility model discloses can realize carrying out remote remote control to the dolly, send the warning to going on by far away and near detection when step voltage exceedes settlement voltage around the equipment that breaks down, greatly reduced person electric shock casualty accident takes place.