Abstract: It is necessary to analyze the thermal radiation characteristics of multi-dimensional heterogeneous turbulent medium at high temperature. Grid positioning is carried out based on each spatial grid represented by CFD data. The radiation intensity of the grid is obtained, according to the radiation mechanism of the gas components. With the aerodynamic thermal radiation intensity of the flow field on the virtual ray trail, a computation model is developed to detect the inhomogeneous media components and the multispectral thermal radiation field in the furnance.In the proposed Weak Membrane Markov Random Field（WMMRF） model, the calculation results of thermal radiation field are taken as the initial conditions and the basis for determining parameters. The furnace thermal radiation field is reconstructed based on multiple infrared detection images, which iterate until the average vector cosine similarity is less than the threshold. The heat radiation characteristic analysis system of high temperature non-uniform flow field is formed.