The invention belongs to a propagation method of south China medicinal plants (Li medicinal plants), in particular to a nauclea officinalis fast propagation method. The method comprises the following steps: selecting sandy loam land blocks for carrying out soil tillage; then, carrying out top pruning bud saving after seed seedlings are planted, wherein each parent strain maintains 2 to 3 strains of healthy and strong lateral buds; placing nutritional bags with nutritional soil on furrows in a seedling green house in lines; taking naphthylacetic acid to be diluted by warm water to obtain rooting liquid; placing the rooting liquid to the normal temperature for use; selecting the lateral buds on the parent strains; then, soaking base parts of the lateral buds in the rooting liquid; sticking the soaked base parts of the lateral buds on the nutritional bags; then, covering an agricultural use film for heat preservation and moisture preservation; carrying out culture; and carrying out seedling emergence and transplanting when the seedlings grow seven pairs of true leaves and the height is higher than 20cm. The invention adopts healthy and strong burgeons for sticking culture, the root system growth can be effectively promoted, the survival rate can be improved, the growing speed of the plants can be improved, the resistance of the plants can be enhanced, good hereditary features of the parent plants are perfectly maintained, and the invention provides a high-efficiency path for the development of the nauclea officinalis planting industry, and is favorable for the development andutilization of the south China medicinal plant (Li medicinal plant) resources.