DOM is one of the most active chemical components in environment.It has great influence on transport and transformation of heavy metals in soil.An investigation on the effects of different DOMs,which were extracted from pig manure(DOMpm) and rice straw(DOMrs),respectively,on adsorption of Cd in the typical vegetable garden soils in Chongqing were carried out using isothermal adsorption and kinetic experiment.The results of experiment showed that the adsorption behavior of Cd was different in different soil and application DOM.In purple soil,DOMrs reduced the Cd adsorption obviously while DOMpm reduced the Cd adsorption in lower concentration but enhanced in higher one.In yellow soil,DOMrs also reduced the Cd adsorption.However,DOMpm can obviously enhance Cd adsorption by soil.