Based on data of monthly sunshine duration in Shouguang City during 1961-2013,changing features of sunshine duration and effects on greenhouse production in Shouguang City were analyzed by using linear tendency method,M-K mutation test and Molet wavelet analysis. The results show that in Shouguang City,sunshine duration in a year and each season reduced obviously from 1961 to 2013,and sunshine duration in a year and autumn changed suddenly in the 1990s,while sunshine duration in winter and spring changed suddenly in the 1980s. There existed obvious periodic variations of sunshine duration in a year and various seasons from 1961 to 2013. The reduction of sunshine duration and the increase of cloudy days resulted in the decrease in the yield of crops in solar greenhouses,so some effective measures should be taken to enhance the light intensity and time in solar greenhouses to promote crop growth. Based on data of monthly sunshine duration in Shouguang City during 1961-2013, changing features of sunshine duration and effects on greenhouse production in Shouguang City were analyzed by using linear tendency method, MK mutation test and Molet wavelet analysis. The results show that in Shouguang City, sunshine duration in a year and each season reduced obviously from 1961 to 2013, and sunshine duration in a year and autumn changed suddenly in the 1990s, while sunshine duration in winter and spring changed suddenly in the 1980s. There existed obvious periodic variations of sunshine duration in a year and various seasons from 1961 to 2013. The reduction of sunshine duration and the increase of cloudy days resulted in the decrease in the yield of crops in solar greenhouses, so some effective measures should be taken to enhance the light intensity and time in solar greenhouses to promote crop growth.