Abstract: Through the structural analysis of the outer circle of a certain type of tin-based alloy bearing, the pouring process method was formulated, including reasonable tin-based alloy pouring parameters and special pouring tooling. Special tooling is used to form a special runner that is conducive to the improvement of alloy quality, to ensure the flow direction and cooling sequence of the alloy, so as to improve the casting quality and reduce the internal defects of the alloy. Through verification, the designed pouring temperature and tooling structure can fully meet the requirements of alloy casting quality.