Abstract: To research the effect of all different kinds of fertilizing selenium that concentration is diversification on different qualities, the research process has focused on fertilizing selenium on Holland 86-13 cucumbers’ and yuezhi cucumbers’ leaves. The result demonstrates that with the concentration of fertilizing selenium increased, the concentration of content of cucumber selenium itself increased. Moreover, the result also indicates that appropriate application of fertilizing selenium on cucumber has dramatically improved cucumber’s quality. However, the process of fertilizing selenium on yuezhi cucumber has contributed on suppression of absorbing Potassium.