In order to improve facility agro-meteorological services, and mitigate the impact of meteorological disasters on greenhouse vegetable production，based on the meteorological observation data inside and outside the solar greenhouse in winter during 2008-2011, the temperature characteristic and the minimum temperature forecast model inside the solar greenhouse in winter were studied by using correlation and stepwise regression analysis method. The results showed that the temperature inside the solar greenhouse had an obvious diurnal variation in sunny and cloudy days, and the range of temperature change was greater in sunny days than in cloudy days. The temperature inside the solar greenhouse was lower in continuous overcast days, and it seriously affected the normal growth and development of plants. The minimum temperature inside the solar greenhouse was preferably related to the temperature outside the solar greenhouse and the humidity, temperature and soil temperature inside the solar greenhouse. The minimum temperature forecast model inside the solar greenhouse in winter has been set up. The forecast model has been verified by recently data. The average absolute errors of the forecast minimum temperature inside the solar greenhouse in different weather conditions was less than 1℃, and the average relative errors were below 10%.