Abstract: Cold crucible induction melter (CCIM) is one of the most advanced technologies for high-level radio waste liquid vitrification. Induction coil is one of the key assembly of CCIM and its design is a critical factor affecting CCIM operation. Other countries in the world have adapted different designs on the cross-section shape, coil turns and winding space of induction coil. Calculation and analysis on these design parameters are important for the development of CCIM in China. The electromagnetic field of induction coil are analyzed by finite element method based on ANSYS software. Due to skin effect and proximity effect, high frequency current in the induction coil is restricted in the surface and the current density presents two peak values at both top and bottom ends of the coil. Along the radial direction, the axial magnetic flux density (B_y) decreases gradually from the inner edge of coil to the center region encircled by the coil. Along the vertical direction, similar with the distribution of current density, B_y also presents two peak values at the two ends of the coil and B_y decreases rapidly in the region beyond the coil height. Coil models with different cross section shapes, turns and winding spaces are built and calculated in ANSYS. The results show that coil with rectangular cross-section has a more uniform distribution of magnetic field than coil with circular cross-section. Coils with the same height but different turns have little effect on the magnetic field distribution. B_y and its uniformity decrease with increasing winding space. According to these results, close-winding coils with rectangular cross-section are recommended for CCIM and the winding space should be 2.5-5 mm.