The invention discloses a method and system for interruption compensating in a wireless access network cell. The method includes the steps that S1, network information data are collected and monitored, and whether network interruption occurs or not in the cell is judged according to the network information data; S2, if cell network interruption occurs, whether the interruption compensating is needed to be carried out or not is judged; S3, when the interruption cell needs the interruption compensating, aiming at the terminal cell, an area coverage rate and coverage overlapping are optimized, and a particle swarm optimization algorithm is used for obtaining an optimization scheme; S4, the optimization scheme is implemented, and the network information data are collected and monitored after the optimization. According to the method and system for the interruption compensating in the wireless access network cell, the area coverage rate and coverage overlapping of the interruption cell are optimized by the adoption of the particle swarm optimization algorithm, the automatic interruption compensating of the interruption cell is achieved, the speed of the interruption compensating is improved, human interference with network operation is reduced to the maximum, and network operation efficiency is improved effectively.