The structure of the variable frequency cable includes three main insulated wires, three neutral insulated wires, with an inner wrapping layer, copper strip layer, outer wrapping layer, and outer sheath layer sequentially set outside the main insulated wires and neutral insulated wires. This forms a 3+3 core structure, enabling the cable to have strong voltage surge resistance, withstand pulse voltages during high-speed frequent frequency changes, and provide excellent protection for variable frequency appliances.