Abstract: The aim is to provide guidance for controllingBatocera horsfieldi in ash tree in the Yellow River Delta. In the paper, quantitative dynamics and frequency of egg, larva, adult (pupa) population were studied by investigating the quantities of egg niche, frass hole and emergence hole ofB. horsfieldi in ash tree. The results showed that,B. horsfieldi population increasing survivorship curve was concave type, population of egg was large, and mortality was also high in the egg stage. There was a negative correlation between eggs, larva and adult (pupa) population number per tree and their frequency number. With the increasing damage of B. horsfieldi per tree, the number of damaged trees with the same damage degree declined. The frequencies classify statistics of eggs, larva and adult (pupa) were all negative binomial distribution, the corresponding spatial distribution patterns of different developmental stages were clumped distribution. The spatial distributions and dynamic changes ofB. horsfieldi population in ash tree and poplar populations were almost the same. The host had less influence on the spatial distributions and dynamic changes ofB. horsfieldi .