Comparison and analyzation of female sex pheromone that had been identified in Noctuidae suggested thatthe sex pheromones were composed by five types of components: esters, alcohols, aldehydes, hydrocarbons andepoxides. These chemicals had simp ly structure. Overlapp ing components exist in separate subfamilies, and withthe increasing in the number of subfamily which contented sharing components, the species of insects whose sexpheromone content overlapp ing components increased. Sex pheromone components were highly similar amongspecies in the same genus and largely sharing among different genera in the same subfamily. Sex pheromonecomponentswere full homology among the species in the same genera.