The invention provides a lifting hook, a mother ship, an unmanned ship launching and recovering system and an unmanned ship launching and recovering method, and the lifting hook comprises a lifting hook body which is provided with a bearing groove, a guiding hole and an unlocking hole, wherein the bearing groove is communicated with the unlocking hole, and the guide hole and the unlocking hole are arranged at an interval; a safety catch which is connected with the lifting hook body, wherein the safety catch resets to lock the bearing groove under the condition of no external force; a guiding cable which is movably arranged in the guiding hole in a penetrating mode, wherein the connecting end of the guiding cable is used for being connected with the unmanned ship, and the operating end of the guiding cable is used for being fixed to the mother ship; and an unlocking cable which is movably arranged in the unlocking hole in a penetrating mode, the connecting end of the unlocking cable is connected with the safety buckle, the operating end of the unlocking cable is connected with an operator, and the operator pulls the unlocking cable to drive the safety buckle to unlock the bearing groove; by adopting the technical scheme, the operation efficiency of recovering the unmanned ship is improved, the operation risk of operators is reduced, the refitting difficulty is reduced, the problem of frequently replacing the lifting appliance is avoided, and the operation is safe and convenient.