Abstract: We used packing grains to replace traditional packer in order to improve the precision of inflow control device (ICD) for the completion of horizontal wells, and to seal the whole well bore. Flows in horizontal directions can be blocked. In this way, ICD controls water flow and stabilizes oil production. It realizes the dynamic adjustment of flows in the whole horizontal well section. This new technique was applied in the second completion of the Tahe oil field. This was the first time adopting non-mechanical tools to realize packing in tube. We designed new packing materials, which can stand higher pressure and are more economic. The materials performed well in laboratory experiments, and have a good potential in new well completion and secondary completion.