In order to solve biological control and ecological control techniques to paddy pests, predators as materials, we studied the predatory natural enemy of paddy using the field survey, collecting specimens and indoor identification method. The results showed that there were 59 predator species belonging to 20 families in paddy ecosystem of Tongliao Areas. Among of them, 32 species of insect belonging to 10 families, 5 orders, 25 species of spider belonging to 9 families and 2 species of frog belonging to Ranidae were identified. The five insect orders were Odonata, Mantodea, Neuroptera, Hemiptera and Coleoptera separately. The dominant species were Cyrtorrhinus lividipennis Reuter, Paederus fuscipes Curtis, Propylea japonica (Thunberg), Erigonidium graminicolum (Sundevall) and Agelena difficilis Fox. They accounted for 45.5% of the total of predatory natural enemy.