Solar pest-killing lamp is one of the main tools for green prevention and control of pests in the field. To study the effect of improved JYSH-2A solar pest-killing lamp (wavelength：320~600 nm) on pests in Liangshan Prefecture, experiments were carried out on sites in Xichang city and Ganluo county. The identification and analysis of collected insects showed that more than 80 species and a total number of 15,376 insects were trapped by the improved pest-killing lamp, which could kill a variety of pests targeted and had a pest control rate of more than 85%. Moreover, the improved pest-killing lamp caused less damage to beneficial insects, so it could be used as a major control measure for field pests in Liangshan Prefecture.