The invention discloses a high frequency viscosity-reducing electrode device based on a high-low frequency crude oil viscosity-reducing device. The high frequency viscosity-reducing electrode device based on the high-low frequency crude oil viscosity-reducing device comprises a sealing box body which is made from nonmagnetic materials, a plurality of magnetizers which are wound with coils are fixed in the sealing box body, insulating sealing rubber layers are arranged between the magnetizers and the sealing box body, positive electrodes of the coils are all connected with single-core copper wires I, negative electrodes of the coils are all connected with single-core copper wires II, wire outlets are fixed outside the sealing box body, double-core external copper wires are arranged in the wire outlets, positive electrodes of the double-core external copper wires are connected with the single-core copper wires I, and the negative electrodes of the double-core external copper wires are connected with the single-core copper wires II. The invention further discloses a method for making the high frequency viscosity-reducing electrode device based on the high-low frequency crude oil viscosity-reducing device. The high frequency viscosity-reducing electrode device based on high-low frequency crude oil viscosity-reducing device and the making method thereof lay a foundation for development of high-low frequency crude oil viscosity-reducing devices based on high frequency viscosity-reducing electrode devices.