To raise the utilization efficiency of aviation project resources and reduce project cost

an ant colony-simulated annealing optimization to solving the problem of network plan resource leveling and optimizing is proposed. Firstly

the project hierarchical network plan are incorporated by using the pretreatment algorithm

and a object function for optimizing resources is established considering the relationship of resource index and the overlapping network. Secondly

the key-space-constructing method of ant colony-simulated annealing arithmetic based on network plan is discussed. Besides

the rules of arithmetic’s state-shift

pheromone updating and the effectively simulated-annealing-local-search-strategy are proposed

and a detailed approach for resource leveling and optimizing is established. Finally

the arithmetic is illustrated by using representative instance.