The tree shape of weeping willows varies with the place of cultivation. The weeping willows by the lake require the trunk to be slightly inclined to the water surface and the branch point to be low. The trunk of street trees should be tall and straight, with high branching points, which can blend into the natural crown of the trunk. Before planting weeping willows, the trunk should be fixed, and the street trees should be cut off by 3 ~ 3.5m All the above branches should be cut off, and a large number of new branches can sprout in that year. When cutting in winter, select 3-4 healthy branches with appropriate direction, interval of 40-50 cm and mutual dispersion for short cutting as the main branches of the first layer; The remaining branches can be thinned first, and the weak branches can be put down slowly without cutting, so as to increase the photosynthetic area and promote the rapid growth of the central stem. In the second year, the extension branches of the central trunk were cut short, and at the same time, 3 ~ 4 branches near the incision were cut off. The second layer of main branches were selected on the central trunk and the top was cut short. Cut the main branches selected last year, leave buds on the incision to enlarge the crown, but control the height not to exceed 1/3 of the main branches to form an inverted oval crown with clear main branches, layered main branches and drooping willow branches. To reach a certain height, only the sprouts and branches that are too low and unfavorable for viewing can be appropriately cut off every year. Weeping willows age quickly, so attention should be paid to thinning weak branches, pests and diseases during pruning to strengthen growth advantages; For old and weak trees, you can wipe your head and cut it from the first or second branch. A large number of tillers can sprout near the kerf in that year, leaving 3-4 branches in the right direction as main branches, and a complete crown can be formed in the next year. If the willows of roadside trees droop and affect the driving of vehicles, the branches on one side of the roadway can be cut short, and the low branches stay short and the high ones stay long, so as not to hinder the driving of vehicles. After pruning, the crown is basically unchanged, for the sake of beauty.