The experimental on the effect of calcium under simulated acid rain on rape total calcium,pectin calcium,soluble calcium and residual calcium is studied. The results show that applying the suitable concentration of calcium ions can increase the rapeseed various forms of calcium concentration in the body,applying high concentration of calcium in the body of the form of calcium rapeseed relatively low,indicating that the high concentration of calcium to some extent inhibited calcium rapeseed absorption. After a decline under simulated acid rain,rape body pectin calcium concentration with applied calcium concentration increases,and reaching peak concentration. Under Acid Rain rape total body calcium and residual calcium concentration is increased and the water-soluble calcium concentration is decreased,possibly after entering the cells and tissues of acid rain some anions and water-soluble calcium into the reaction caused by residual calcium results.