Treatment method of titanium-containing waste solution

The invention provides a treatment method of a titanium-containing waste solution which contains titanium tetrachloride, an organic solvent and halogenated alkoxy titanium and/or ester-titanium complexes. The method includes following steps: performing a separation process to the titanium-containing waste solution for separating the organic solvent and the titanium tetrachloride to enable the organic solvent in a residual solution to account for 0-20% by weight of the residual solution; and successively performing a temperature-decreasing process and a solid-liquid separation process to the residual solution. By means of the method, recovery rates of the titanium tetrachloride and the organic solvent can be significantly increased. In addition, solid can be precipitated at a high temperature, thereby increasing a precipitation efficiency of solid impurities and effectively increasing waste solution treatment efficiency.