通过测定桃树上扁剌蛾幼虫的空间参数m、K、α、β、b值，导出了桃树上扁刺蛾幼虫属聚集公布，分析了引起聚集分布的原因，同时根据Iwao、Kuno法，分别制订了幼虫不同密度、不同结果枝未被害率下的几种理论抽样模型，根据Gerrard法制订了不同结果枝被害率下虫量密度的简易估值模型，经检验效果较好。 Based on the determination of m, K, α, β, and b values ​​of the larvae of Paeonia lactifloides on peach tree, the larvae of Laodera larvae were collected and published on the peach tree. The reasons for the aggregation and distribution were analyzed. According to Iwao, Kuno’s method Several theoretical sampling models were developed for larvae with different densities and different unharvested rates. According to the Gerrard method, a simple model for estimating the densities of dendritic pests with different damage rates was developed.