Abstract To multi-station(multiqueue) cyclic service system, this paper advances a grade compound new strategy of a development adjust service quantity to fit the station load unbalance system. This paper discusses mainly about:(1) Introduce new strategy;(2) The features of new strategy system line up service model; (3) The queue status transition regularity of limited capacity new strategy system;(4) The algorithm of queue status transition rate; (5) The irregular algorithm of queue status rate.