Abstract: In some induction heating process, induction coil is connected with power source through connecting power cable. In order to solve the problem of lower heating efficiency brought by connecting power cable, the power loss and the energy stored in inductance during induction heating were calculated. The analysis and the experiments carried out three kinds of cables, including parallel solid cables, hollow cables with same axis, and the cables made by lots of electrically insulated slimlines. It shows that the cables made by lots of electrically insulated slimlines have the lowest power loss and the hollow cables with same axis have the lowest inductance. So a kind of advantageous cable structure was put forward, which is arrayed around same axis by lots of electrically insulated slimlines for both inside conductor, and outside conductor and the middle of inside conductor is hollow.