The niche of major predatory arthropod on different resistant rice planthopper in three paddy fields were studied, the results showed that Ulmmeliata insecticepes was the key predator of rice planthopper in early rice. The spatial niche breadth of Dyschiriognatha dentata on resistant variety was the highest while that of Staphylinidae was the highest on susceptible variety. The temporal and temporal-spatial twodimension niche overlap value of predatory arthropod to rice planthopper on medial resistant variety was higher than that on resistant rice planthopper and susceptible variety. The predatory of medial resistant variety was more effective to control rice planthopper.