The invention provides an electric power industry carbon emission right distributing method based on an improved entropy weight method. Going deep into the electric power industry carbon emission process, in combination with the influences of discharge emission intensity, comprehensively considering the encouragement mechanism of clean energy power generation orientation and promoting the green and low-carbon development of the electric power industry, the carbon emission right distributing scheme is more reasonable. With the aid of the entropy definition and properties in the information theory, rules between all index relation properties are excavated, information entropies are introduced to serve as effective value indexes of all factors of the carbon emission right distribution, artificial subjective consciousness interference can be effectively avoided, the logic relation among all the indexes is well reflected, and the distribution result is more accurate and is closer to reality. By improving the calculating method of the index effective values, it can be avoided that small differences of entropies probably cause the multiplication of entropy weights and the inconsistency ofthe entropies and transmitted information, and the problem that corresponding entropy weight numerical values are not stable when the entropies of traditional entropy weights are close can be well solved.