Abstract: By using the index of 6 kinds of aggregation indices on spacial distribution pattern,Taylor's power principle,and Iwao's regression analysis method,the spacial distribution pattern of Lygus lucortumMeyer-Dur's over winter eggs was studied.The results show that these eggs are aggregation distribution on the jujube trees,which accords with minus binomial distribution.This distribution pattern results from the worm's habit and the cir cumstances.The theoretical sampling number of Lygus lucortumMeyer-Dur's over winter eggs is ascertained by the distribution indices.