Abstract: In compliance with the computational principle of coal blending, a coal blending model for the best combustion was put forward based on summing up and comparing some common coal blending methods. A curve to describe the relation between the ignition point of mixed coal and the proportion of high-volatile coal was obtained by curve-fitting. It is found that the proportion of high-volatile coal at which the descent rate of the ignition point of mixed coal reaches to a certain tiny value is considered as the optimum proportion. This method was used to optimize the proportion of high-volatile coal in four different groups of mixed coal and it is proved by static burning experiment that the computed results are accurate, reliable and practical.