The utility model provides a portal crane driving stopping promptly buffer stop. Belong to hoisting machinery technical field, it has been solved and has bumped against the problem that causes the accident among the prior art between the portal crane. This portal crane driving stopping promptly buffer stop including the portal crane, sets up a touch bar on the landing leg of portal crane, to should touch bar another portal crane on the track being provided with the touching acceptor, touch bar includes the body of rod, body, and body of rod slidable overlaps in the body, and the body is fixed on the landing leg, is provided with buffer spring between the body of rod and the body, and touch bar's body of rod collision back was received to the touching receiver, made the braking state reversal of portal crane stopper. The utility model discloses can make the portal crane that was stopping originally removals of taking advantage of a situation after receiving the striking so that the portal crane in moving stops, avoiding the bigger damage of production.