Abstract: According to the structural characteristics of rod-shaped titanium alloy casting, the gating system is designed by using sequential solidification theory and equilibrium solidification theory respectively, and the two gating systems are simulated by numerical simulation method. The temperature field and stress field of rod-shaped titanium alloy casting are analyzed, and the casting scheme using equilibrium solidification theory is determined to be suitable for the production of the casting. According to the simulation results, the casting process scheme is optimized and simulated. The optimized casting process is adopted to produce castings, and qualified rod-shaped titanium alloy castings meeting the needs of customers are obtained.