In order to reduce the decision deviation caused by subjective factors in the process of multi-objective decision, the AHP and entropy weight are introduced into the evaluation of deploy location decision of rear command post. Taking all kinds of factors influencing the deploy location decision of rear command post into consideration, constructing natural environment, traffic condition and battlefield safety evaluation indexes respectively, establishing a decision evaluation model of deploy location decision of rear command post. Then using the AHP and entropy weight to evaluate several reasonable deploy location and getting the advantages and disadvantages of each deploy location. The effectiveness and feasibility of this method are verified by the example. This method can provide a reference for the army to select deploy location of rear command post.