In order to make high accuracy predictions of high temperature combustion gases infrared radiation characteristics, the spectral band model parameters such as spectral absorption coefficient or spectral transmittance which changed with gases temperature and wave number must be invoked. A new construction method of spectral band model parameters database based on Malkmus statistical narrow band model was proposed. The HITRAN2008 and HITEMP2010 molecular spectroscopic databases were employed to meet the requirement of normal temperature and high temperature calculations in the mode, and a calculation program for the Malkmus statistical narrow band model with average transmittance had been developed. Then the program was employed to calculate the single component spectral radiation characteristics of CO₂ and H₂O in both homogeneous path and inhomogeneous path respectively, and the multi-component spectral radiation characteristics of CO₂, H₂O and N₂ in inhomogeneous path. The result shows good agreement with the experimental data from the literature, and the proposed Malkmus statistical narrow band model is suitable for the high temperature gas radiation transfer characteristic calculation.