The present invention provides an electrolyte for preparing a metal titanium. The electrolyte is characterized in that the electrolyte contains a halide of an alkali metal and/or a halide of an alkaline earth metal, and fluorine titanate. The present invention further provides a molten salt for preparing a metal titanium. The molten salt is characterized in that the molten salt is formed by melting the electrolyte for preparing the metal titanium. The present invention further provides a metal titanium preparation method, which comprises adopting an electric conduction solid solution of a titanium-containing raw material as an anode, and carrying out electrolysis in a molten salt to prepare the elemental titanium, wherein the molten salt is the molten salt for preparing the metal titanium. With the technical scheme, the current efficiency and the product quality are significantly improved.