【Aim】 Exploring the community composition and spatio-temporal niches of dominant families of moths in jackfruit orchard to provide a reference basis for monitoring, warning, and ecological control of pests. 【Method】 The moths in jackfruit orchard were collected using the light trapping method for classification, identification, and statistics. The Levins niche width and Pianka niche overlap index were used to analyze the temporal and spatial resource occupancy of major moths as well as the competitive coexistence relationship between communities. 【Result】 A total of 47 species of moths belonging to 10 families were collected. The dominant families with a proportion of species and a relative abundance greater than 5% were: Sphingidae (29.79%, 48.58%), Arctiidae (19.15%, 24.23%), Lymantridae (17.02%, 9.24%), Pyralididae (10.64%, 5.18%), Geometridae (8.51%, 7.84%). The spatio-temporal niche width of dominant families was generally larger,and the main types of niche overlap are ＂wide wide＂ types. 7 families with a relative abundance greater than 1% were paired to form 21 pairs of combinations. All the combinations have overlapping meanings in both the temporal and spatial one-dimensional niches. In the temporal and spatial dimensions, there were eight and seven pairs of combinations with significant overlaps, respectively. However, in the spatiotemporal two-dimensional niche, the number of combinations with overlapping significance decreased to 10 pairs, with only one pair of combinations significantly overlapping. 【Conclusion】 The dominant families of moths in jackfruit orchards generally have strong ability to occupy time and space resources. The spatial and temporal niche overlaps of dominant families are larger. There may be a significant separation in resource dimensions other than the space-time niche, which is the reason for their coexistence.