Abstract: The predation capacity of Orius sauteri adults on four insect pests, adults of Thrips tabaci, 4^th larvae of Bemisia tabaci, female adults of Tetranychus cinnabarinus and adults of Brevicoryne brassicae were studied in laborotary. Results showed that the functional responses of adults O. sauteri to four insect pests could be described with Holling II equation, i.e., Na=1.0819Nt/(1+0.08485Nt) on T. tabaci, Na=2.704Nt/(1+0.1423Nt) on B. tabaci, Na=1.9641Nt/(1+0.2455Nt) on T. cinnabarinus, Na=1.5912Nt/(1+0.1808Nt) on B. brassicae, respectively. The predation capacity of O. sauteri was strongly interfered by its own density, and the relationship between predation efficiency and intraspecific interference could be described with Hassell model. The predation rate of O. sauteri was positively related with prey densities, as its searching efficiency was negatively associated with prey densities. The maximum attack rate (a') and predation capacity (Na) of O. sauteri on T. cinnabarinus were revealed among four preys, meanwhile the shortest handling time (T\-h) was observed on T. cinnabarinus, but the minimum attack rate on T. tabaci, and the minimum predation capacity and the longest handling time on B. tabaci.