The limited combat resource is one of the important factors that restrict the capability of shipboard aircrafts in attacking the ground targets.The force assignment of shipboard aircraft is studied,based on which a new force assignment optimization model is built up for surface-target attacking.It is put forward that the reasonable usage of the combat resources should also be taken into consideration besides the original target value and attacking risk.Analysis of examples shows that:with given combat resources and targets for attacking,the method can optimize the force assignment scheme to certain degree.