Abstract: Solar energy introduced in oil shale mining can reduce fossil energy consumption and carbon emissions.In this paper,an oi shale in-situ recovery system driven by solar tower is proposed,the steam parameters of the solar field and the spacing between producing wells are optimized.On this basis,the research on waste heat recovery is carried out to improve the energy efficiency of the system.The results show that by optimizing steam parameters and well spacing,the thermal efficiency η of the system can be increased from 22.4% to 33.5%,based on this,by recovering the steam waste heating of the production well,the thermal efficiency η of the system is further improved:increases to 38.4%,and the shale oil production cost PC decreases from 306.0/t to 174.7/t.