The invention discloses a method for preparing titanium liquid and a method for preparing titanium pigment. The method for preparing the titanium liquid comprises the following steps: a. quenching blast furnace slag containing titanium is processed in the acidolyses with the inorganic acid; b. the material after the acidolyses of the step a is leached by the inorganic acid, and is filtered to get the filtrate; c. the filtrate performs the acid dipping on the quenching blast furnace slag containing the titanium; d. the material after the acid dipping is hydrolyzed and filtered to get the titanium-enriched material; e. the titanium-enriched material is processed in the acidolyses with the inorganic acid; f. the material after the acidolyses of step e is dipped in the acid solution, and is filtered to get the titanium liquid. The method utilizes the quenching blast furnace slag containing the titanium that is produced in the ironmaking production process, and has simple craftwork, and realizes the effective application of the valuable element in the blast furnace slag, and also resolves the problem that the waste acid is difficult to be processed in the production process of the titanium white, thereby reducing the environmental pollution.