A study on exchange-adsorption of aluminium and manganous ions under conditions close to the field was carried out.The principal results were shown as follows:The exchange-adsorption between aluminium/manganous and calcium/potassiumions acted still in accordance with the universal rule of ion exchange,but remained contradictory to the ratio law;The mechanisms of adsorbed/displaced mole rat io being less than 1 between aluminium/manganous and calcium/potassiumions and for exchange of potassium by calciumion were discussed;Parameters k,r,1/n,K and $F were also explained,and in this regard k and K were much higher and lower in value respectively.In view of $F,the natural tendency of acidification as a result of aluminium transformation in red soils was further proved in thermodynamics,and the energy characteristics for exchange-adsorption of aluminum and potassium by calciumion was revealed.