The invention belongs to the technical field of network communication, and particularly relates to a queue management method of a communication access network aggregation node of a power system terminal. The queue management method comprises the following steps: 1) setting three service queues, and respectively receiving three types of service A, B and C; 2) waiting for grouping arrival or leaving requests, in case of grouping arrival, turning to a step 3), and in case of grouping leaving requests, turning to a step 4); judging the types of arrival grouping, determining whether receiving or abandoning is implemented according to length of corresponding types of service queues; 4) determining which types of service are transmitted according to a QLT (Quasi-Lattice Theory) algorithm; 5) judging whether an arrival queue buffer zone length adjusting time is met or not, and if the arrival queue zone length adjusting time is not met, turning the step 1); or else, turning to a step 6); 6) predicting the length of a queue of a next queue buffer area length adjusting time, adjusting the length of queue buffer areas according to prediction results with the combination of the queue management method, and turning to the step 2). By adopting the queue management method, the packet loss probability of a high-priority queue is ensured, and the overall packet loss probability is also reduced.