From a three-year fix-location field experiment, the research work on the Se content of paddy soil and effect of foliage spray of Se-compound on the Se content of rice in Jiashan plain, the author found that:(1) The water soluble Se of paddy soil in Jiashan plain, resulting from the low contents of the total Se of paddy soil, was below critical value (0.01μg/g). It was significantly related to parent material and geomorphological factors etc; (2) The absorption of Se by rice was restricted by low water soluble Se of paddy soil, resulting in the rice Se reduction in this region. The average of rice grain Se was lower than the normal food Se contents (0.040-0.070μg/g); (3) The above-ground organs of rice contain different amounts of Se: the Se contents in the bran and the straw were higher than those of both early and late rice grain; the Se contents in the grain, bran and straw of the early rice were lower than those of the late rice, respectivey; (4) By spraying 20μg/g Se compounds during the different rice growth stages the Se contents in the grain, bran and straw were increased, and the Se contents of the grain finally met normal standards of Se contents in food. The best time to spraying Se-compound was at the full spik stage,and effect on early rice is better than that on late rice.