Abstract: In order to reduce energy consumption，sylvite was used as raw material during the process of recovery of low grade potassium resources.Three layers level perfusion was adopted for sylvite solar pond construction test.In this paper，solar pond running test was carried out under the simulating environment temperature of 15 ℃ and lower troposphere solution of solar pond was utilized to prepare potassium chloride.Results showed that the sylvite solar pond can effectively aggregate solar energy，and the highest temperature can reach 43 ℃ in the lower troposphere during the stable operation.The solution with higher temperature and density from the bottom of sylvite solar pond can be prepared for industrial grade potassium chloride products through the cooling crystallization.

Key words: sylvite, solar pond, potassium chloride