The invention discloses a method for grading QoS energy efficiency in a power communication network and belongs to the field of power communication networks. According to the method for grading the QoS energy efficiency in the power communication network, the network delay, delay shaking and packet loss rate are calculated by means of mathematical modeling and random sampling measurement, and then energy consumption and handling capacity are calculated so that obtain an QoS energy efficiency grading model for the power communication network can be obtained. According to the method for grading the QoS energy efficiency in the power communication network, the model is solved by means of intelligent artificial fish-swarm optimization, the rate of convergence and the optimizing accuracy are improved by means of a mutation operator of the genetic algorithm, then the artificial fish-swarm algorithm with the mutation operator is improved by means of the simulated annealing algorithm, a globally optimal solution is obtained through complementation between all the algorithms, the QoS energy efficiency of each router in a new generation of power communication network is determined, the energy consumption of a data stream can be smallest during transmission, and the energy efficiency of the network can be largest on the premise that certain QoS of the network is guaranteed.