Abstract: The spatial distribution patterns of Coccus sp. were determined, and the equations of optimal sampling were formulated based on the regression models with multiple aggregation indices. Aggregated indices and regression analyses by Taylor′s Power Law, Iwao′s m*-m Regression Analysis and Lanxingping′s m*v and Lam Regression Analysis methods all showed that the spatial distribution patterns of C. sp. in the forest stands belonged to aggregation distribution. The aggregation reasons of the C. sp. in the forest stands were analyzed by Blackith Aggregation Average method and the result showed that the aggregative spatial distribution pattern of C. sp. was positively related to its environment and the biological characteristics of itself.