In order to settle the problem of choosing radar spare part transportation route, an evaluation index system of transportation route choice plan is established. In view of the problem that many indexes involved in route choice can not be quantified, the weight of index is hard to be determined or low in creditability, an information entropy method is adopted to obtain the entropy weight of each index in the evaluation index system and the grey fuzzy evaluation of transportation route choice plan is performed by combining the fuzzy theory and grey theory in application. Finally the reasonable sequence of choosing the route is gained. The result can be a help to the commander in making a quick decision and the model is of some instructive value in improving the spare part support effectiveness in wartime.