This article studies the stomatal density and the open and close level of stoma of the six different breeds’ wheat leafs (Ke19, Ke20, Ke30, Ke33, Ke40 and Jing-dong8), which is in the different period of duration and the different breeds in one day (from 6: 00 to 18: 00). The result indicates: The stomatal density of upper epidermis is remarkably bigger than that of lower epidermis in all studied varieties; It is different that the stomatal density of different wheat in the different period of duration and the different breeds. The arrangement order is, the jointing stage > the booting stage=the maturing stage > the grain filling stage > the tillering stage; the quantity of the stomatal density of the wheat has no bearing on the drought defying ability of the breeds of the wheat. It has no obvious difference that the leaf blade stomata’s daily change rule of the six different wheat breeds.
