In order to solve the storage service unavailable problem on account of the management node fault in huge cloud storage system, an analysis model for fault effect of management node is built and a dynamic self-recovery algorithm for management node based on message called FRA-M is presented. FRA-M implements the cooperation, transparent take-over and self-recovery of management nodes by metadata update control based on load balance. Experiment shows FRA-M can provide management nodes auto switching when fault occurs and achieve good load balance by favorable resource allocation. The performance of FRA-M is also maintained in a relatively stable interval by reasonable control of TCP timeout, fault detection cycle and fault detection timeout. The storage service availability, data usability and data reliability are guaranteed by FRA-M during the breakdown of management nodes.