Abstract: The icing of transmission line and electric railway catenary brings lots of hidden safety hazard,which will cause major accidents and economic losses in serious cases. At present,AC/DC ice melting technology is mainly used to solve the icing problem of transmission lines and electric railway catenary. Starting from the principle of AC/DC ice melting,the circuit implementation and basic principle of AC/DC electric ice melting technology were introduced,two application scenarios were compared,advantages and disadvantages of AC/DC ice melting technology were discussed,and relevant improvement measures were given. Combined with the configuration principle of AC/DC ice melting and practical application cases,the operation condition of AC/DC ice melting device was introduced in practical application,its operation environment was analyzed,the structure and configuration of AC/DC ice melting device were studied,and suggestions on the configuration principle of mentioned technology and equipment were put forward.