The utility model provides a novel anti-freezing system of a catenary of a high-speed electrified railway. The novel anti-freezing system of the catenary of the high-speed electrified railway is characterized by comprising an anti-freezing device and a contact line, wherein the anti-freezing device is connected with the contact line through the existing catenary, and the anti-freezing device comprises a voltage transformer, a lightning arrester, a current transformer, an electric disconnector and an electric reactor. According to equipment composition of the novel anti-freezing system, an existing traction power supply device is made full use of, the anti-freezing device is additionally arranged, the whole equipment composition is simple, operation is flexible, equipment loss is low, the investment is small, engineering implementation is convenient, and maintenance is convenient. According to the novel anti-freezing system, the contact line is electrified, heat is generated through heating of resistance of the contact line, and the phenomenon that a catenary is in the frozen state is avoided. By the adoption of the novel anti-freezing system, ice coating of the catenary in the power cut and maintenance process can be effectively avoided, it is ensured that the catenary supplies electricity in time and is put into operation, dangerous situations are prevented from happening, and normal and safe operation of a high-speed railway system is ensured.