The invention discloses a power communication network service operation quality evaluation method. The method mainly comprises the following steps: constructing a communication network model; calculating the probability of occurrence of different failure scenes according to the Markov state transition theory; determining the number of failure scenes needing to be considered according to a set confidence interval; calculating an average service failure index and an average service influence index under different failure scenes according to the considered failure scenes, and combining the failure probabilities of different scenes to obtain a whole network comprehensive service failure index and a comprehensive service influence index; and judging the operation quality of the network serviceby comparing the size of the whole network comprehensive service failure index and the size of the whole network comprehensive service influence index under different service distributions of different networks or the same network. The method provided by the invention can objectively reflect the business risk condition of the power communication network, and the related algorithm is low in calculation complexity.