Main control board hard start processing method and device

The invention provides a main control board hard start processing method and device. On one hand, the service board and the optical protection board are switched to the serial connection access mode within the preset duration from the time when the main control board is determined to be offline, so that the flow can be received and forwarded, the network is ensured not to be interrupted to the maximum extent, and the main control board is enabled to realize non-perception hard start. And on the other hand, when the main control board is offline for more than the preset time length, the serviceboard and the optical protection board confirm that the network equipment is abnormal, the serial access mode is switched to the off access mode, and the service board and the optical protection board are disconnected, so that the working modes of the service board and the optical protection board are intelligently switched, and possible abnormal flow is prevented from entering the network. And the robustness of the netw