Abstract: In this paper, an experimental setup for jet impingement heat transfer was established. The permanent magnets were used to produce a constant external magnetic field for experimental study on jet impingement heat transfer with molten salt. Both the radial distribution of convective heat transfer coefficient and correlation of stagnation Nusselt number were obtained. The results showed that the heat transfer of molten salt could be enhanced by the function of magnetic field, resulting in increasing of Nusselt number of molten salt. Especially, in the stagnation region, stagnation Nusselt number increased with increasing of the intensity of magnetic field obviously. Under the conditions of Reynolds number Re=6400 and intensity of magnetic field B=2800 Gs, stagnation Nusselt number of molten salt reached a maximum value about 5.48% higher than without magnetic field. In the region of wall jet, the effect of heat transfer enhancement gradually decreased. It was shown that the magnetic treatment may promote distinctly heat transfer in jet impingement of molten salt.