Abstract: In this paper, the contents of some heavy metals in soil, unplished rice, well water and aludge were examined in the areas of irrigation ditch in Chuan Sha cou-nty of Shanghai. The results showed that after stopping sewage irrigation for ten years, soil contamination induced by heavy metals was stili serious, though the Cd content in unpolished rice was lower than that of in 1976, and there was no effect on well water. The ways to deal the old irrigation ditch were discussed.