Data quality evaluation is very important for military data construction. To improve the science and rationality of the military data quality evaluation, a data quality evaluation index system is constructed according to the feature of military data in the paper, and then an evaluation comprehensive model is constructed with multilevel grey evaluation method to estimate the data of several departments. The evaluation test shows that the results of the proposed method is reasonable and effective, and have great significance to enhance the scientific level of the management of military data quality.