Abstract: Great deal of mining solid wastes in China are generated and stored，with low comprehensive utilization rate.It has become a key factor for threatening the mine ecological environment.So，iron ore waste rock was mixed respectively with iron tailings，hill campus soil and farm soil，to prepare different levels of mixed soil，and medicago sativa were planted on these soils for testing.The results show that，the chemical properties of various mixed soils were related to the texture of incorporated fine grained soil，and its the chemical properties were improved with the increasing of fine grained soil (d < 0.075 mm); The performance of iron ore waste rock was more significantly improved by mixing with hill soils，campus soil and farm soil than iron tailings; When the incorporation of fine grained soil in all kinds of mixed soil was about 90% of the waste rock in quality，the nutrient of various mixed soils and growth of medicago sativa have no significant difference，compared with the fine grained soils.

Key words: Mine solid waste, Mixed soil, Proportion of mixture, Waste rock