Abstract: A low-cost solar steam generation system with heat concentration is designed and built. The heat localization is employed to improve the vaporization temperature and steam production efficiency. The top heat loss is much higher than the sum of the bottom and side heat losses in the solar steam generation system. The top heat loss is reduced by 41% by using double-gazing cover. The experiment results show that the vaporization temperature reaches above the boiling point（94 ℃）with heat concentration. In typical sunny day,the daily steam production of the system with 8 m~2 collector reaches 4.03 kg. The conversion efficiency is about 9% when the working temperature is 120-140 ℃.