The invention discloses a method for branch grafting of fortune purple liquidambar formosana in the growing period. The method comprises the steps of grafting time selection, stock cultivation, scion selection, grafting and post-grafting management. The method has the advantages of patch budding, but does not have the high requirement for scion quality of patch budding, scion thickness can be flexibly selected, scions with high lignifications degree, full auxiliary buds and thickness larger than 0.3 cm can be used, scion utilization rate is increased remarkably, and the method has extremely high application and popularization value in production.