Abstract: Because it can affect the mode of fluid in the process of growing semiconductors, the magnetic field can improve the distribution of composite and impurities in the crystal. The convection in the melt can be restrained by applying supermagnetic field while growing semiconductors. High quality semiconductors can be grown with such technique. The effects of convection and diffusion on the quality of semiconductors can also be investigated with this technique. A newly designed and fabricated supermagnet puller has been reported in this paper.