A new fault-tolerant ATM switch architecture based on Multistage Interconnection Network (MIN) was proposed. Multiple paths between each input-output pair of the network are accomplished by connecting together switching elements within the same stage. Besides that, 2" 2x2 switching element were distributed between stage n to n+l in MIN to increase the paths for each input-output pair. It is self-routing, recursive in structure and smaller network easily be cascaded to form larger network. Compared to the conventional mechanism, it reduces delay and gives better performance in term of stability and throughput .