The invention discloses a rapid cutting propagation method of crape myrtle single-plant germplasm. On the basis that crape myrtle single plants with the good characters of the natural tree type, flowering habit, flower color and flower diameter size and the like are surveyed and screened out, incising and sprouting promotion is performed on optimized single-plant rootstock portions or purging and sprouting promotion is performed on the surface soil layer lateral roots to form young root sucker coppice shoots at the developmental stage, the coppice shoots are used for ear making and cutting propagation, cutting seedlings are used for building a cutting orchard, cutting orchard building and management are performed by routine, scion wood is completely collected and processed on the base of the trunk of the stock plant to promote sprouting and cultivation of coppice shoots, the standard quality of ear cutting and making is strictly regulated, the cutting seedbed matrix arrangement is simplified, rooting accelerator arrangement and using method are optimized, limitation of the cutting season is broken through, rapid long-term large-scale cutting seedling is achieved, the cutting survival rate and nursery stock quality are improved, and the cutting seedling cost is lowered.