Abstract: The mathematical field model of induction heating was developed for the fabrication of glass-coated copper microwire. The skin effect in the long solid cylinder billet and distribution of electromagnetic field were described. Moreover, the figures of the electromagnetic and eddy current density were obtained with the MATLAB software. The effect factors of the distribution of electro-magnetic field were analyzed. The results show that the intensity of magnetic field decreases with diameters and numbers of induction coil increasing. The glass-coated copper microwire with a diameter of 18 mm and 3.3 mm of copper microwire in diameter was characterized by scanning electron microscope and X-ray diffraction.