Abstract: Micropipeline is an efficient way for pipeline design in an asynchronous circuit, and router chip is the key technology in high\|speed communication networks. In the paper here, the basic structure and control of micropipeline are introduced, and then the application in ASIC router chip with micropipeline is given. The router chip achieves the goal of simplicity, efficiency and reliability. Finally some issues to be researched further in more a complex circiut system are pointed out.