The invention provides a corrosion-resistant titanium alloy which comprises the following components in percentage by mass: 2.0-7.1% of Al, 2.5-50% of Zr, 0.5-3.5% of Mo, 0.5-2.5% of V and the balanceof Ti. Content of each element is strictly controlled, and Zr and Ti can be subjected to infinite solid solution treatment, so that corrosion resistance of the titanium alloy can be remarkably improved, and therefore, the titanium alloy has excellent corrosion resistance in most of media of acid, alkaline and salts; Mo and V are added, so that stability of a beta phase in the titanium alloy is improved; and creep resistance, in the titanium alloy, of Mo is relatively strong, and corrosion resistance, in a chloride solution, of the titanium alloy can be improved. According to the experimentalresults, the corrosion resistance of the corrosion-resistant titanium alloy is more excellent as Zr content is increased; and compared with a comparison alloy obtained by the same treatment process, the corrosion-resistant titanium alloy improves corrosion resistance, in a sodium chloride solution, by 8.4-50.6%.