Abstract: The artificial nerve network method and spatial tendency plane analysis method were used to study the relationship between the amount and spatial position of Chinolyda flagellicornis diapause larva.The BP (Back Propagation)network model and cubic tendency plane model of the spatial quantitative distribution of C.flagellicornis diapause larva were established.The results showed that the BP network model has high precision of fit in simulating the amount of diapause larvae with different spatial position.When the amount of crypto neurone is 12,the mean simulation precision reaches 96.90%.The mean forecast precision of 20 groups of sample prepared in advance reachs 92.35%.The mean simulation precision of cubic tendency plane model is 93.01%,while the mean forecast precision of 20 groups of sample prepared in advance is 93.24%.