The invention provides a flowering branch pruning method for promoting the high yield and high quality of cut roses. The method includes the steps that the upper end of a first-level flowering branch is sheared, and one to two second-level flowering branches sprout from the upper end of the first-level flowering branch; after the second-level flowering branches grow and are ripe, the base portions of the second-level flowering branches are cut to form a fresh cut flower product, upper flowering branches are sheared from the first-level flowering branch where the second-level flowering branches are sheared, the first-level flowering branch with a bud point is left, the bud point on the upper portion of the first-level flowering branch sprouts to grow and form a new second-level flowering branch, and accordingly multiplied cut flower products are obtained. On the situation that the number of seedlings planted each mu is fixed, the yield of cut flowers is increased doubled and redoubled. Meanwhile, the cut flowers with high quality are obtained by controlling the flowering stage while the yield is increased, selling price is higher, and high economic benefits are obtained.