The invention discloses a TGT stability optimization method in a distributed storage system. The optimization method is applied to the distributed storage system or single storage. The optimization method is characterized in that when a TGT is utilized to externally provide an iSCSI Target service, a problem of a single-point failure formed by the TGT in a single machine is solved through a multi-process and module splitting way, so that the failure isolation is increased, the failure influence range is greatly reduced, and the system stability is greatly improved; resource isolation and abstraction can be realized on an operating system by user mode processes, the user mode processes can be completely isolated and do not affect with each other, the process isolation is utilized, so that the TGT service is more fine-grained, more controllable and smaller in influence range.