Abstract:The study on spatial construction and relationship between Haltica chalybea (Illiger) and its predatory natural enemy Erigonidium graminicola was conducted by using geostastics from May to August, 2004. The spatial construction of Haltica chalybea (Illiger) and Erigonidium graminicola showed aggregated distribution at different periods and their semi-variance models were describedly spherical. The ranges of spatial dependence of Haltica chalybea (Illiger) and Erigonidium graminicola were 1.164-8.508 and 2.977-7.799 respectively. The space patterns between two analyzed by the indices of the aggregation degree were consistent of spatial dependence between them was nearly coincidence at different periods. Erigonidium graminicola followed Haltica chalybea (Illiger) on populations and space. The space patterns analyzed by the indices of the aggregation degree were consistent. The action of E.graminicola aggregation is the result of some environmental factors. And also the reason of the aggregation of H.chalybea for its density less than 2 capitals per plant is due to some environmental factors. But for H.chalybea with density more than 2 capitals per plant, the density itself is one of the reasons of its aggregation.