对四会市大沙镇稻田主要节肢类捕食性天敌群落的结构和动态进行了研究。结果表明,节肢类捕食性天敌包括捕食性昆虫和蜘蛛两大类,共15科36种;群落的垂直结构可分为两个主要层。早稻群落结构随着时间的变化,优势种和亚优势种也在不断变化之中,晚稻群落中的优势种地位虽无变化,但种群数量却在不断波动。 The structure and dynamics of predatory natural enemy community of major arthropods in Dasha town of Sihui were studied. The results showed that the predatory enemies of arthropods include predatory insects and spiders, which are 15 families and 36 species. The vertical structure of communities can be divided into two main layers. With the change of the structure of the early rice community, the dominant species and subdominant species are also changing. Although the dominant species in the late rice community have no change in position, the population fluctuates.