In order to improve the method for bioremediation of soil contaminated by heavy metals, ironbased complexes produced by the metabolism of iron bacteria A were used to remediate soil contaminated by Pb2+or Cu2+. The effects of bioremediation through different grouting methods were investigated. Methods including scanning electron microscopy (SEM), Xray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR) were used to identify the composition and structure of ironbased complexes and to analyze the deposition mechanism of heavy metals. Results showed that the concentrations of available Pb2+ and Cu2+ in soil decreased by 64.6％ to 70.4％ and 47.6％ to 49.2％, respectively, after one round of biogrouting, and decreased by 75.1％ to 85.5％ and 73.3％ to 78.9％, respectively, after two rounds of biogrouting. Microscopy analyses showed that the ironbased complexes, which contained schwertmannite and Ferrum oxydatum phosphate, as well as other substances with excellent flocculation efficiency and large specific surface area, had poor crystalline form, but could fix heavy metals in a contaminated environment through adsorption and coprecipitation.