Abstract: Based on the phototacticcharacteristics of orchard insect communities，utilizing LED light source and control systemmanufactured by ourselves，the investigations of LED light source′s spectral illumination，strobe light，regulation illumination inducing orchard insect were carried out.And the factors influencing on the phototactictrap and maintain of orchard insect communitieswere were analyzed.The results suggested that the sensitive spectrum of lepidoptera and coleoptera insect，small insects， beneficial insectsis blue-violet spectrum，blue-greenspectrum，violet spectrumseparately，simultaneously，most of orchard pests enjoyed the weak light，while coleoptera insect pests tend to strong light.Optical vision system of orchard pests has a dependency on the weak light of night，and their phototactic behavior is stimulated easily，but their visual sensitive spectrum of phototaxis decides on the degree of phototacticperceptron，the spectral illumination affects the strength of phototactic trap and the degree ofphototactic stimulation scope，the regulation switch effect of 25 Wblue-violet light with on 3 min and off 1 min，which illumination is 950 lx，can restrain the adaptability of insect′s vision on the continuous stimulation of light and phototacticinertness，and the total effect trapping and killing orchard pests is relatively good，comparing with similar products，25% electrical energy can be saved.At the same time， orchard insect communities can be regulated and maintained effectively，while the best stroboscopic frequency and the stimulus cycle of regulated light stimulation stimulating orchard pest′s phototactic vision，generating the trapping and killing effect，as well the stimulatingmechanism，must be further researched.