Method for quickly shaping high-stem grafted bougainvillea glabra in lollipop shape

The invention belongs to the technical field of plant shaping and discloses a method for quickly shaping high-stem grafted bougainvillea glabra in a lollipop shape. The method includes: subjecting small-leaf purple bougainvillea glabra to long-shoot cutting cultivation to obtain a high-stem bougainvillea glabra stock potted plant; when thickness of a top grafting reserved branch 30cm above reaches0.8-1.2cm, selecting a high-branch-erectness bougainvillea glabra variety in another color as a scion, grafting on the high-stem bougainvillea glabra potted plant stock by cleft grafting, topping once by keeping three leaves every time a sprout of the scion grows five leaves, and performing repeated topping on each lateral branch to obtain a basic frame by cultivation; by repeated directional topping, cultivating a crown in an externally-dense internally-hollow spherical or trapezoidal lollipop shape. The method for quick cultivation in a cultivation process of 180-210 days is simple and convenient to operate, short