Abstract: A survey of species of Homoptera and Hemiptera as well as its distribution and dynamic in Paulownia woods in Lankao County was carried out in 1997. Among 27 species,there was 11 species of Hemiptera and 16 of Homoptera. Results showed that the quantities were significant differences. The quantities of 6 species was 99.56% of the whole number of insects captured among those 27 species,while the number of Empoasca flavescens (F.) Smaller was 88.8%. The distribution of insects was in positive correlation to the height of Paulownia canopy. The population of the insects underwent 3 stages from early May～mid June,late June～mid September and from late Sept.～Nov.