Abstract: A field trial was carried out to assess the population density and temporal dynamics of density of Sogatella furcifera, Nilaparvata lugens, Laodelphgax striatellus, Nephotettix cincticeps, Deltocephalus dorsalis, Cicadula fasciifrons, Pirata subpiraricus, Gnathonarium gibberum, Ummeliata insecticeps and Crytorrhinus lividipennis by using different nitrogenous levels 0, 90, 150 and 210 kg/hm2. The results showed that: the population densities of the three rice planthoppers in 210 kg/hm2 treatment were significantly higher than those in 0, 90, 150 kg/hm2 treatment; no significant difference of population density of the three rice leafhoppers, and Pirata P. subpiraricus, G. gibberum and U. insecticeps was found among all the treatments; moreover, temporal dynamics of density of rice planthoppers, leafhoppers and their predators were basically consistent in different nitrogenous fertilization levels. The results indicated that high nitrogenous fertilization could significantly increase the population density of rice planthoppers, but had no significant influence on population dynamics of rice leafhoppers and their predators.