The invention discloses a method of improving the lodging resistance of a high-quality rice variety Xiangyaxiangzhan. The method comprises steps: (1) the target yield of Xiangyaxiangzhan is determined; (2) the land capacity yield is determined; (3) the reasonable total amount of
nitrogen application is calculated, wherein the
total nitrogen application amount calculation method is: the
total nitrogen application amount (kg / mu)= [the target yield per mu (kg) - the land capacity yield per mu (kg)]*R / 100, R is a
nitrogen application constant and refers to the
nitrogen application amount for producing per 100 kg of rice on the basis of the land capacity yield, R has different values for early and late seasons, R=7 in an
early season and R=8 in a
late season; and (4) the nitrogen application ratio of a base
fertilizer to a tillering
fertilizer to a
panicle fertilizer is reasonably distributed. According to climatic conditions,
soil fertility and variety characteristics, the reasonable nitrogen application amounts during the full-growth period of rice and the planning and management ratio of the
nitrogen fertilizer in early, middle and late stages of the
rice growth are designed by the method, the number of stems and tillers during the
rice growth process develops steadily, the
population structure is reasonable, the
plant height is shorter, the internode is shortened, and the lodging resistance of the variety is thus improved.