[ ] To address the heavy metal pollution of the surrounding farmland soil and water sources caused by the waste generated during the mining process, we took the polluted soil around the lead-zinc mine in Yangshuo County, Guilin City, Guangxi Province, as the research object, and used the indoor soil cultivation experiment to add different ratios of red mud, silkworm sand and ferrous sulfate to prepare a complex passivator, and analyzed the effects of different passivators and their dosage on the compound contamination of arsenic, lead, and cadmium in the soil to find a suitable complex passivator. The effects of different passivators and their dosages on the compound contamination of arsenic, lead and cadmium in soil were analyzed, so as to find the suitable compound passivator. The results show that different ratios of red mud, silkworm sand and ferrous sulfate can change the content of arsenic, lead and cadmium in the three heavy metals in the contaminated soil in different degrees and biological activity, of which 0.2% silkworm sand +0.8% ferrous sulfate has the best effect on the remediation of arsenic, lead and cadmium in the effective state were reduced by 70.08%, 38.80% and 1.49%, respectively, and the residual state of arsenic, lead and cadmium increased by 66.67%, 3.20% and 10%, respectively, 3.20% and 10% respectively. Soil pH was highly significant positively correlated with effective state arsenic and effective state lead (P<0.01, the same below), and significantly negatively correlated with effective state cadmium (P<0.05, the same below); soil organic matter was highly significant positively correlated with effective arsenic." 0.2% silkworm sand + 0.8% ferrous sulfate" composite passivator for arsenic, cadmium and lead composite contaminated soil heavy metal passivation effect is the best, the results of the study on the improvement of composite passivation materials in mine soil treatment provides data support.