The invention provides a rapid cultivation method for a vitis sinocinerea caulerpa reproductive shoot. The rapid cultivation method comprises the following steps: cutting a stolon of 8-10cm as a reproduction mother twig from an end part of a grape caulerpa stolon; burying the reproduction mother twig into sand; covering the shade of a cultivation area with black sunshade net, keeping the light intensity of the cultivation area lower than 1000 lux, keeping the water temperature of the cultivation area to be 28-30 DEG C, and feeding shellfish with plankton feeding habit; applying phosphorus-containing nutritive salt, and when the rhizoid length is greater than 18cm, turning over the sand to collect rhizoid; inserting the collected rhizoid into sand, keeping the light intensity be 1500-2500 lux, and cultivating for 100-120 hours at the water temperature of 25-28 DEG C. By the adoption of the technical scheme of the invention, the vitis sinocinerea caulerpa reproductive shoot can be rapidly cultivated by using an artificial system, and the growth rate and the unit area yield are increased.