A method for planning a recovery resource for resisting N-time faults, comprising: Planning (S100, S200), on an optical transmission device according to preset network planning information, a recovery resource for resisting (N-1)-time faults for preset (N-1)-time faults, wherein N is an integer greater than or equal to 2, and the recovery resource for resisting (N-1)-time faults is an optimal recovery resource corresponding to each interrupted service during the preset (N-1)-time faults, wherein for each interrupted service the recovery resource planned by using an optimal path in multiple different recovery paths corresponding to the service during an interruption is used as the optimal recovery resource of the interrupted service; and Planning (S101, S201), by the optical transmission device according to the network planning information and the recovery resource for resisting (N-1)-time faults, a recovery resource for resisting N-time faults for preset N-time faults, wherein the recovery resource for resisting N-time faults is a network-wide optimal recovery resource corresponding to interrupted services during the N-time faults; wherein the planning, on the optical transmission device according to the network planning information and the recovery resource for resisting (N-1)-time faults, a recovery resource for resisting N-time faults for preset N-time faults comprises: traversing, by the optical transmission device, N-time faults as the preset N-time faults, and determining each interrupted service during the N-time faults; planning, by the optical transmission device according to the recovery resource for resisting (N-1)-time faults and each interrupted service during the N-time faults, the recovery resource for resisting N-time faults for each interrupted service during the N-time faults; updating, by the optical transmission device, the recovery resource for resisting N-time faults; and repeatedly performing, by the optical transmission device, the foregoing steps until a preset quantity of repetition times is reached. Planning (S100, S200), on an optical transmission device according to preset network planning information, a recovery resource for resisting (N-1)-time faults for preset (N-1)-time faults, wherein N is an integer greater than or equal to 2, and the recovery resource for resisting (N-1)-time faults is an optimal recovery resource corresponding to each interrupted service during the preset (N-1)-time faults, wherein for each interrupted service the recovery resource planned by using an optimal path in multiple different recovery paths corresponding to the service during an interruption is used as the optimal recovery resource of the interrupted service; and Planning (S101, S201), by the optical transmission device according to the network planning information and the recovery resource for resisting (N-1)-time faults, a recovery resource for resisting N-time faults for preset N-time faults, wherein the recovery resource for resisting N-time faults is a network-wide optimal recovery resource corresponding to interrupted services during the N-time faults; traversing, by the optical transmission device, N-time faults as the preset N-time faults, and determining each interrupted service during the N-time faults; planning, by the optical transmission device according to the recovery resource for resisting (N-1)-time faults and each interrupted service during the N-time faults, the recovery resource for resisting N-time faults for each interrupted service during the N-time faults; updating, by the optical transmission device, the recovery resource for resisting N-time faults; and repeatedly performing, by the optical transmission device, the foregoing steps until a preset quantity of repetition times is reached.