鞍形花蟹蛛（Ｘｙｓｔｉｃｕｓｅｐｈｉｐｐｉａｔｕｓ）是果园树上蜘蛛种群的优势种，它对苹果园鳞翅目幼虫一尺蠖（Ａｐｏｃｈｅｍｉａｓｐ．）有较强的控制作用。鞍形花蟹蛛对该幼虫的捕食量随着猎物密度的增加而增加，其功能反应符合ＨｏｌｉｎｇⅡ型曲线，由于蜘蛛个体大，活动力强，所以个体间相互干扰作用也较强。研究结果表明，果园蜘蛛是捕食性天敌的重要组成部分，保护和利用蜘蛛对果园害虫持续性综合治理有重大意义。 Xysticusephippiatus is a dominant species of ornithopal spider population and has strong control over Apochemiasp. The predation of the larvae on the larvae increased with the increase of the density of the prey. The functional response accorded with the Holing Ⅱ curve. Because of the large spider individuals and strong activity, the mutual interference between individuals was also stronger. The results show that orchard spiders are an important part of predatory natural enemies, and the protection and utilization of spiders are of great significance to the sustainable integrated management of orchard pests.