Titanium tetrachloride refined tail gas is very complex and is a harmful gas with high toxicity.At present，no reli able technology has been found to recycle them.The composition and physical properties of titanium tetrachloride refined tail gas were comprehensive studied.More than 20 kinds of materials were identified in the tail gas.They are gas impurities and liquid impurities in the crude titanium tetrachloride.Among them，TiCl4 and SiCl4 are main components.The use of rectifica tion method to separate TiCl4 and SiCl4 in titanium tetrachloride refined tail gas was proposed.The exhaust condensate rectifi cation experiment was made.The mass fraction of SiCl4 was more than 95% which was gotten in the middle distillate.Residual TiCl4 in the reactor reached 96.5%，and recovery of titanium tetrachloride reached more than 90%.This research opens up a new approach for the disposal utilization of titanium tetrachloride refined tail gas.