The invention discloses a manglietiastrum sinicum Law bending pruning propagation seedling culture method, belonging to the field of plant propagation. The method comprises the following steps: selecting a 3 to 4-year-old manglietiastrum sinicum Law branch, and ringing the branch for one circle respectively at upper and lower positions, away from a trunk by 8 to 12cm, on the base of the branch, wherein the two circles have the width of 2 to 3cm and are deep into a xylem; peeling of a bark, then sleeving with a proper bamboo section, fixing the bamboo section on the branch, filling the bamboo section with a wet rooting medium prepared in advance, keeping the wetness of the medium in the bamboo section, and timely replenishing water for the medium in the bamboo section, wherein rooting is started after 30 days, and after 180 days the branch can be sawn off to serve as a seedling for field planting. The invention provides the bending pruning seedling culture method for a rare plant, i.e., manglietiastrum sinicum Law; the method greatly increases the seedling culture success rate of the manglietiastrum sinicum Law, and achieves an aim of quick cultivation for propagation expanding.