The solution method of ultraviolet propagation function involved multiple scattering through grid generation is investigated. Through curring up many spatial grids in space,the radiant intensity in each spatial grid is discreted in a direction Ω using relative weight factor. According to a given emission source specification as well as the boundary condition and the initial condition,it can be resolved with high efficiency and precision through splitting method. The contributions of source-term and propagation term are calculated seperately in each period of time. By Laplace conversion,the analytical solution of partial differential equations are solred separately;the each step′s contributions can be obtained;then the value of next moment can be solved. Compared the results with that using Monte-Carlo calculation method,it saves more time by using grid generation to solve the function of ultraviolet radiation propagation,and its largest computing error is 6.9%.