Abstract: In order to increase keeping temperature and reservoiring heat capacities and land utilization rate, on the basis of the common solar greenhouse, double-roof solar greenhouse was constructed; temperature and illumination performance and land utilization rate were contrasted. The results showed that: keeping temperature and reservoiring heat capacities of the solar greenhouse facing the sun was far superior to the common solar greenhouse. In the coldest winter, to provide facility security for warm-season fruit vegetable to overwinter safely. Land utilization rate of double-roof solar greenhouse was increased to more than 85%. The solar greenhouse facing the sun was used to produce overwintering and early spring vegetable, the solar greenhouse beyond the sun was applied to produce early spring green leaf vegetable and solanaceous fruits over summer and into autumn.