The trapping effect of Jiaduo frequoscilation pest-killing lamp was studied in vegetable fields in Jianghan plain from 2009 to 2010. The results showed that the insects trapped by the lamp were mainly Lepidoptera and Coleoptera insects. There was no significant difference between the trapped numbers in the two years,but there were significant difference among the months. The peak of species richness was nearly 50; the diversity index was from 2. 0 to 4. 0,and the evenness index varied from 0. 3 to 0. 8,while the dominant concentration index of insects varied from 0. 05 to 0. 50. It was helpful to detect and prevent insect pests according to their peak occurrence time inferred by trapping results. The trapping effect of Jiaduo frequoscilation pest-killing lamp was studied in vegetable fields in Jianghan plain from 2009 to 2010. The results showed that the insects trapped by the lamp were mainly Lepidoptera and Coleoptera insects. There was no significant difference between the trapped numbers in the two years, but there were significant difference among the months. The peak of species richness was nearly 50; the diversity index was from 2.0 to 4.0, and the evenness index varied from 0.3 to 0. 8, while the dominant concentration index of insects varied from 0. 05 to 0. 50. It was helpful to detect and prevent insect pests according to their peak occurrence time inferred by trapping results.