【目的】 探索我国粘虫Mythimna separata (Walker)种群周年北迁南回的动态规律。【方法】 2014-2017年分别在全国16、25、24、23个省（市、区）17、28、27、26个县（市、区）设立了17、35、34、31台高空测报灯，系统观测了全年或主要发生期逐日蛾量。【结果】 基本掌握了粘虫在我国全年各代发生区域、发生时间和发生数量，为全国区域预报提供了重要依据。【结论】 我国华南江南、西南、长江中下游、黄淮、华北、东北和西北等区域是我国粘虫成虫发生区域，每年循环发生5个代次；30° N以南区域诱测到越冬粘虫，27° N及以南的观测点虫量较多，冬季未观测到区域间虫源交流；浙江象山、上海奉贤、江苏东台、山东长岛、河北滦县是粘虫北迁南回的主要路径；华南江南、长江中下游、黄淮、华北、东北等区域间观测到虫源交流，华北和东北地区2代、3代可进行虫源交流；东南亚国家或许为我国提供较多虫源，我国粘虫存在种群重建的可能，这有待于今后进行国际合作、深入研究。

[Objectives]  To investigate the population dynamics of Mythimna separata (Walker) during its south to north migration in China. [Methods]  In 2014 - 2017, 18, 35, 34 and 31 vertical-pointing searchlight-traps were set up in 18, 28, 27 and 26 counties (cities and districts) of 17, 25, 24, 23 provinces (Municipalities and autonomous regions) in China. The number of moths captured was recorded daily over the whole year and periods of peak abundance were systematically recorded. [Results]  Basic information on the range, phenology and abundance of different generations of armyworm in China was obtained, which provides an important foundation for national regional forecasting of outbreaks of this pest. [Conclusion]  Adults occur in South China, Southwest China, the Middle and Lower Reaches of Yangtze River, the Huanghuai River, North China, Northeast China and Northwest China. There are five generations annually. More armyworms were trapped in the area south of 27ºN than south of 30ºN. No migration between armyworm populations was observed in winter. Xiangshan in Zhejiang Province, Fengxian in Shanghai, Dongtai in Jiangsu Province, Changdao in Shandong Province and Luanxian in Hebei Province are the main migration routes of armyworms year-round. Migration between populations were observed in South China, the middle and lower reaches of the Yangtze River, the Huanghuai River, North China and Northeast China. The second and third generations of the North China and the Northeast China populations exchange migrants. Because Southeast Asian countries may contain source populations of armyworms that migrate to China, comprehensive understanding of the population dynamics of the armyworm in China will require further study and international cooperation.