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Through the investigation of the regularities of lightning disasters for heritage buildings, it is proposed that the assessing indicators of lightning protection for heritage buildings include such factors as the value of heritage buildings, lightning density, the environment, service facilities, heritage building height, surrounding trees, building structure, history, etc. Using the analytic hierarchy process (AHP) to determine the index weight, according to the protection level of heritage buildings and the regularities of lightning disasters and lightning activity, the current national standards, and referring to the Likert scale and the equal weight index to evaluate the indexes, the classification evaluation model of heritage buildings is established. The results are of certain significance to the protection of heritage buildings.