The invention belongs to the technical field of directive breeding of seedlings and particularly relates to a rapid cultivation method of easy-to-transplant cluster trident maple. The rapid cultivation method comprises the following steps: cluster tree form design, careful selection of coordinated excellent plants, combination, shaping and planting, compound preparation treatment, nutrient soil backfilling, annular burying with sandy soil, firm shaping support, fine management and care and the like. The tree form designed by the method is that the base has 3-7 branches, and single trident maple plants with a meter diameter of 7 cm or above and coordinated tree performance are selected to constitute branches of the cluster trident maple; planting holes are dug, the trident maple is arrangedaccording to the designed tree form, soil is washed away from soil balls adjacent to root systems through a screwdriver or water while roots are reserved, so that root systems of adjacent single plants are tightly close, and the roots are treated with a compound preparation with rooting promoting and sterilization functions; soil mixed with organic fertilizer is fully backfilled, compacted and fully irrigated; sandy soil surround the peripheries of tree holes; multiple independent triangular supports are set up, each single plant is fixed to constitute branches of the cluster trident maple; and timely watering and fertilization are carried out, and the cluster trident maple can be sold after being cultivated for 2 years.