The invention discloses a numerical computation method for predicting the flue gas recirculation sintering mass-heat coupling process. The method comprises the steps of 1, building a two-dimensional unstable state mathematic model inside a sintering machine in the material layer coupling process of a sintering material layer; 2, according to a homogeneous reaction model and a non-homogeneous reaction model, solving the heat effect of each material in the sintering process, and then solving a mass source item and a heat source item in a mathematic model control equation; 3, according to heat transfer and mass transfer parameters and material layer geometric structure parameters, calculating convective items and diffusion items in the equation; 4, obtaining mixed material temperature and gastemperature inside the sintering layer, bottom outlet flue gas temperature and ingredients through calculation; 5, performing comparison validation on the actual result and the calculation result obtained in the step 4, and determining a value of an empirical coefficient; 6, performing optimization and simulation, performing simulated analysis on control parameters and thermal parameters in actual production so as to optimize the flue gas recirculation sintering technology.