External counterweight device of crane

The utility model belongs to the technical field of cranes, and particularly relates to an external counterweight device of a crane, which comprises a mounting frame, a movable base capable of being adjusted left and right is arranged on the mounting frame, a counterweight frame is fixedly connected to the top of the movable base, and a stop lever capable of being adjusted up and down is arranged on the counterweight frame. A plurality of partition plates and a plurality of auxiliary rollers can be arranged in the counterweight frame, a plurality of moving rollers are fixedly connected to the bottom of the mounting frame, a connecting plate is fixedly connected to the top of the mounting frame, and the connecting plate is externally connected with a crane through bolts; according to the utility model, the counterweight blocks can be conveniently added at any time, the positions of the counterweight frame and the mounting frame can be conveniently adjusted, the crane can be better stabilized, and the practicab