The invention relates to a crape myrtle tender branch vessel cuttage method and belongs to the technical field of plant cutting. The crape myrtle tender branch vessel cuttage method comprises the following steps including the first step of cutting medium and vessel preparation, the second step of cutting spike selection, the third step of the cuttage process, the fourth step of the transplanting process, the fifth step of follow-up management and the sixth step of seedling adaptation, wherein S1, the cutting medium and vessel preparation is conducted, and sterilized perlite, an organic cutting medium, a nutrition pot, a cuttage disk and a water tank are prepared; S2, the cutting spike selection is conducted, and crape myrtle tender branches are selected for cuttage; S3, the cuttage process is conducted, and the crape myrtle tender branches are put into the water tank in a cuttage mode; S4, the transplanting process is conducted, and after callus tissues of the crape myrtle tender branches subjected to the cuttage are formed, the crape myrtle tender branches are transplanted into the nutrition pot and urgently need to be cultivated in the water tank; S5, the follow-up management is conducted, water level in the water tank is kept, and perpendicular incidence of sunshine on the water tank needs to be avoided; S6, the seedling adaptation is conducted, and then the cultivation is completed after the seedling adaptation. By means of the crape myrtle tender branch vessel cuttage method, the defect that entire tender branches can not be used in the existing crape myrtle cuttage technology is overcome, cuttage breeding production can be conducted in the whole crape myrtle growing season, large-scale crape myrtle breeding can be achieved, the survival rate is high, the finished products after the cuttage are container-grown seedlings, and the long-distance transport is facilitated.