Abstract: Age structure is one of the important indexes of the manpower contingent. When manpower planning is carried out, the replenishment tactics that is chosen should make the age structure reasonable for the consecutive and stable development of the specialized manpower contingent. Inthis paper,, the standard mode of the age structure is derived, the model of age structure and replenishment for the specialized manpower planning and with high dimension and inequality constraints is built, and a three level decomposition-coordination algorithm for the optimal planning is put forward based on the decomposi t ion-coordinat inn techniques in large scale systems theory. The fast convergence and the feasibility of the presented methods are proven by a practical example.