Abstract: A key problem addressed in study of uninhabited aerial vehicle (UA V) is to coordinated assign targets in multi-UAVs. The mathematic model for mul t i-UAV cooperative target assignment problem was built, when assigning targets i n multi-UAVs, the model considered about effect of the battle field situation, a n d differences in different UAVs and targets. A multi-UAV target assignment algo r ithm based on the satisficing decision theory was presented. Each individual pro posed its satificing set, the algorithm searched the global optimal assignment s cheme on all individual satisficing sets. To settle the multi-target assignment problem, the algorithm was applied by taking the atta ck scheme as the element of the individual satisficing set. To expand the proble m size, a hierarchical structure was presented by which the algorithm was extend ed to the hierarchical form. The method evidently can improve the searching efficiency and obtain the optimal results.