发展了１种求解两群多维中子扩散方程的新的非线性迭代节块方法。通过引入耦合修正因子建立了耦合系数可调的粗网有限差分方程。在非线性迭代过程中，利用高阶方法的计算结果修正粗网有限差分方程。所使用的高阶方法基于１种解析模型，利用两群横向积分扩散方程的解析解，得到 A new nonlinear iterative nodal method for solving two groups of multidimensional neutron diffusion equations is developed. The coarse mesh finite difference equation with adjustable coupling coefficient is established by introducing the coupling correction factor. In the process of nonlinear iteration, the finite difference equation of coarse mesh is modified by the result of higher order method. The high-order method used is based on one analytical model, using the analytic solution of two groups of transverse integral diffusion equations,