Abstract: [Objective] The study focuses on clarifying the role of neighboring crops distribution patterns and plastic film mulching cultivation in ecological regulation of Colorado potato beetle.[Method] The present study compared the differences of Colorado potato beetle population in potato fields accompanied by different adjacent crops in existing cropping patterns.[Result] There were basically the same population dynamic patterns among different potato fields with other different kinds of adjacent crops,but there were significant differences among their population amount of Colorado potato beetle.Near the previous year's potato fields,the fields were damaged seriously,but the damage levels would be reduced with increasing distance between the potato fields.[Conclusion] Planting different kinds of crops influences the population dynamic of Colorado potato beetle to a certain extent and the ecological control of the Colorado potato beetle population can be carried out by adjusting the planting pattern.