Paulownia tree is a deciduous tree, rapid growth, good material, is making furniture. Instruments and building houses, etc. good wood. However, paulownia has the characteristics of false bifurcation branching, that is, the branch stops growing in the fall, the shape is not the top bud; to spring growth, near the top of the next two side buds sprouting new branches, to both sides of the growth of this kind of like bifurcation branching, but is not a bifurcation branching, called false bifurcation branching. Seedling afforestation later, the top bud does not continue to grow up the trunk, side buds sprouting component plates, the formation of a new canopy; planting of low-dry paulownia seedlings, became a "low-dry" paulownia trees. Planted three or four years later, in general vigorous growth, although it will also spontaneously upward trunk, however, this spontaneous upward growth of the new trunk, most of them are not straight, which reduces the value of the wood, but also affects the traffic and in the crops among the mechanized cultivation.

According to the characteristics of false bifurcation branching of the paulownia tree, and the characteristics of the late upward spontaneous growth of the trunk, we use artificial "trunking" method, can make the paulownia tree from the "low trunk" into the "high trunk ", to improve the value of wood.