Aiming at the fuzzy multi-attribute decision making which the attribute value is fuzzy number in optimizing operational scheme of armored regiment, introduce a fuzzy multi-attribute decision making method based on information entropy. Use information entropy to acquire the attribute weighting. On the basis of additive weighting, the fuzzy utility values of alternatives are obtained. Alternatives are ranked and selected by using the expected value method of ranking trapezoid fuzzy numbers. The example shows that the fuzzy multi-attribute decision making method is scientifically, effectively, easy to calculate and can provide reference to commander for choosing the optimal operation plan.