Abstract: Lodging resistance capability of hybrid japonica rice Tiyou 418 and Liaoyou 5218 were investigated under higher fertility condition. The results suggested that Tiyou 418 and Liaoyou 5218 possessed ideal stalk physical characteristics of lodging resistance, such as shorter basal and second internodes, longer major and minor axis of over cross section of basal stem, wider wall thickness and bigger area of wall section of basal stem. Thus plants showed stronger lodging resistance capability. By shortening the length of the first and second internode, improving the intensity of physical characters of basal stalks, lowering the position of panicles, increasing the length of panicle and neck-panicle properly, lodging resistance of hybrid japonica rice was strengthened. So the contradiction among the lodging resistance, plant height and biomass were settled at a level of higher yield.