Soil heavy metal pollution is severe in mining areas of Southwest China, and combination of pollution remediation and functional reconstruction has become the key to the sustainable utilization of soil. This study identified that heavy metal pollution as well as the destruction of soil productive and ecological function are the main obstacle factors for the low-carbon sustainable utilization of soil in the southwest mining areas. By analysing previously reported pollution remediation technologies such as low-carbon leaching of pollutants, phytoremediation, microbial remediation and combined remediation, this study clarified that the combined microbial-plant remediation technology has become an advantageous technology for the remediation of heavy metal-contaminated soil in southwestern mining areas. Additionally, the paper outlined soil ecological and productivity reconstruction techniques, proposed that developing new technologies based on in situ transformation of soil heavy metals and crop production is key to realize the transformation of soil ecological-productive functions and sustainable utilization of resources in the mining area of Southwest China.