Abstract: Recent research progress of numerical simulation on brazing was summarized, while the development tendency of systematization, refinement and precision for simulation technology was predicted. It concludes that 1) the finite volume method and molecular dynamic methods have been used to stimulate the wetting and spreading behavior of molten filler droplet on basement. It is helpful to investigating the influence of parameters on the wetting, spreading and gap-filling of filler metal under multi-physical field coupled brazing processes. 2) The finite element method has been used for accurate stimulation of stress field and distribution of residual stress of brazed joints, the temperature field during brazing process, and estimation of mechanical property of brazed joint respectively. The simulation results are in good agreement with the experimental results. But some key aspects, such as the reasonably simplified constitution models, introduction of material properties parameters and consideration of the influence of interface mass-transfer and reaction compounds etc. are still difficulties and focuses of research in the future.