A study was carried out to investigate the effects of soil ameliorants on the accumulation of heavy metals by soybean in Huanjiang of Guangxi. The results showed that all soil ameliorants (coal ash, fungi residues, silkworm excrement) decreased effectively heavy metal contents in soybean, during the seedling, podding and mature stages. The heavy metals inhibition effects were best for mushroom residue in seedling stage, for silkworm excrement in mature stage, for coal ash in podding stage. Coal ash also reduced most heavy metal contents in soybean grains.