Abstract: With the rapid economic development in China, industry and agriculture cause a lot of pollutants, including heavy metals, to be discharged into the environment, and the soil environmental pollution is becoming more and more serious. Since lime repairing has low cost, simple operation, quick repairing process and obvious effect, it has attracted lots of attention, and the effect of lime on soil heavy metal pollution repair mechanism has become one of the hot research spots. In this paper, the research progress of the remediation of heavy metal contaminated soils by lime was reviewed systematically. The influence mechanism of lime on the bioavailability of heavy metals in soils and the repairing effect of lime on soils contaminated by heavy metals were discussed. The results showed that the mechanism of lime restoring heavy metal polluted soil was mainly through the adsorption, precipitation and complexation of heavy metals in soil by changing the soil pH value, CEC, BS and Eh. At the same time, types of heavy metal and land use could affect the repairing effect of lime. Therefore, in the actual repairing process, we should take into consideration the type of local soil, lime application rate, application period, and application methods, etc.