Abstract: Frequency check methods, regression analysis and several aggregation indices were used to determine the spatial distribution pattern of Dioryctria yuennanella.In addition, the aggregation average method by Blackith was applied to analyze the aggregation reasons of Dioryctria yuennanella.The spatial distribution pattern of Dioryctria yuennanella was positively related to its environment, and the function of biological characteristics only occurred with the change of population density.