Cadets recruiting plan is an essential measurement to prescribe source and quantity of officers, which is significant for the construction and development of officer. With the accumulation of recruiting plans, it is meaningful to make analysis and evaluation of them. By utilizing the clustering technique, this research analyzed recruiting plans in the past years, and provided a quantitative approach to look into the fluctuation of plans and to understand and evaluate closeness of plans with policies. Firstly, the paper summarized characteristics of recruiting plans. Secondly, it proposed a solution which utilized labeled tree to represent recruiting plan and extracted representative subtrees to participate in clustering. Finally, it used co-occurrence idea of "forming clustering cores first, classifying the plans then" to finish the clustering process. Experimental results reveal that the method can provide better clustering results and is efficient.