Meadow moth is one of the serious periodic outbreak agricultural pests in China and it has occurred three times after 1949. However, the cause of periodic outbreak of this moth is still unclear. In this paper, correlation analysis and phase analysis has been carried out between the historical record of sunspot activity and the meadow moth occurrence in China. The results indicate that there is a high synchronization between the outbreak period of meadow moth and the odd period of solar activity. Three outbreaks of meadow moth after 1949 are synchronized with the 19th, 21st and 23rd cycle of the sunspot activity on a time series, although the relationship between the outbreak scale and sunspot activity dimensions is not significant. According to present results and the forecast of the sunspot activity cycle, the authors predict that the fourth outbreak period of meadow moth will be coming during 2017-2020 and reach the peak during 2024-2025 in China.