Abstract: The vitrification start-up process in cold crucible induction melter (CCIM) was numerically analyzed by using COMSOL finite element software. The CCIM diameter and height is 500 mm and 365 mm respectively. The effects of the vertical direction number and position distribution of heating blocks on the heating rate, efficiency and temperature distribution were studied. The results show that the heating efficiency is high when the startup heating block placed between 250-300 mm above the crucible bottom. The electromagnetic heating rate, thermal efficiency increasing rate, temperature uniformity and glass melt volume performances can be enhanced by increasing the vertical direction number of start-up heating blocks and distribution.