Abstract: Sea buckthorn, Hippophae rhamnoides ssp. sinensis is generally regarded as the most valuable species for the conservation of soil and water in arid and semi-arid regions of China, it was heavily damaged by Holcocerus hippophaecolus, Asias halodendri Pallas and Trabala vishnou gigantina Yang in pure man-made sea buckthorn forests in Wuqi County, Shaanxi Province. In order to study the spatial distribution pattern of the three kinds of insect pests and explore damage characteristics of them, the spatial characteristics of H. hippophaecolus larvae, the emerging hole and larvae of A. halodendri Pallas, the cocoon of T. vishnou gigantina Yang were analyzed by using geostatistical methods in two pure man-made sea buckthorn forest, which at different damage levels. Analysis of the isotropic variogram indicated that aggregation distribution pattern of H. hippophaecolus larvae, the emerging hole and larvae of A. halodendri Pallas, cocoon of T. vishnou gigantina Yang were observed in the lightly-infested level and heavily-infested level of sea buckthorn forests. Among them, the distance of spatial dependences of H. hippophaecolus larvae and the emerging hole of A. halodendri Pallas in the heavily-infested level of sea buckthorn forest were 5.900 meter and 7.800 meter, lower than 10.460 meter and 12.290 meter in the lightly-infested forest, meanwhile, the intensities of local spatial continuity in the heavily-infested level of sea buckthorn forest were 63.7% and 73.3%, higher than 51.0% and 69.1% in the lightly-infested forest. Besides, the rest of the indexes were approximate in different damage levels of forests. Analysis based on overlay maps and correlation analysis indicated that the cocoon of T. vishnou gigantina had a clustered distribution at the edge of the plantation, but it didn’t have significant correlation with the two boring insects; A. halodendri larvae had no obvious relationship with the emerging hole of A. halodendri and H. hippophaecolus larvae. However, there was a significant positive correlation between the distribution of H. hippophaecolus larvae and the emerging hole of A. halodendri Pallas. Based on isotropic variogram and correlation analysis, the study explored the relationship among H. hippophaecolus, A. halodendri Pallas and T. vishnou gigantina Yang, it indicated that H. hippophaecolus had a characteristic of commensalisms with A. halodendri, and provided a theoretical basis for integrated management.