The invention discloses a quick splitting and integrating joint for an integral bridge-erecting crane main girder and relates to the technical field of bridge-erecting cranes. The quick splitting and integrating joint disclosed by the invention comprises joints which are respectively arranged on two sections of main girder, wherein a holed connecting lug capable of being inserted into a pin shaft is arranged on a joint surface of the joints; a guide clip is arranged on one joint; a traction drum and a driving device are arranged on one joint; a traction rope is arranged on the traction drum; one end of the traction rope is fixed on the traction drum; the other end of the traction rope is fixed at the other joint. The quick splitting and integrating joint disclosed by the invention is simple in structure, low in processing and manufacturing cost, safe, reliable and convenient to mount and detach and adopts a manner of fixing the connecting lug and the pin shaft, the pin shaft and other parts are not damaged, the repeated utilization frequency is increased, and the cost is reduced. Moreover, the guide clip is matched with the traction drum and the traction rope, so that installation can be accurate and rapid, and the installation and construction efficiency is improved.