The utility model relates to the technical field of cranes, and provides a lifting hook trolley splitting mechanism of a lifting hook bridge crane, which comprises a travelling crane frame, a main trolley and an auxiliary trolley are respectively arranged above the travelling crane frame in a sliding manner, and a mounting structure for connecting the main trolley and the auxiliary trolley is arranged between the main trolley and the auxiliary trolley; the mounting structure comprises two positioning units and two inserting rods, the two positioning units correspond to the two inserting rods respectively, the two inserting rods are symmetrically fixed to the left side of the main trolley, the inserting rods are arranged in the sliding direction of the main trolley, the left ends of the inserting rods are fixedly connected with conical discs, and sliding rings are arranged on the inserting rods in a sliding mode; the main trolley and the auxiliary trolley can be quickly and freely connected through the mounting structure, so that the main trolley and the auxiliary trolley share a driver on the main trolley, a set of trolley running mechanism is omitted, and compared with a traditional integrated trolley structure, the trolley is lighter in weight and lighter in total weight, and the service life of the trolley is prolonged. And meanwhile, the cost consumption can be reduced while the use working condition is met.
