Transplanting method for improving survival rate of big tree

The invention provides a transplanting method for improving the survival rate of a big tree, which comprises the following steps: S1, selecting a healthy big tree root for transplanting according to the design requirement and the principle of adapting to the place and the tree; s2, carrying out root cutting treatment on the transplanted big tree 2-3 years before transplanting; the ratio of root systems to soil mounds is 1: 4-1: 9, the root systems are protected by straw ropes, commercially available big tree transplanting rooting powder diluents are sprayed on the fracture surfaces, the big tree transplanting rooting powder diluents are diluted by 450-550 times, then hilling is conducted, soil is compacted, and a bamboo pole triangular support is used for assisting; s3, digging the tree, and transporting the big tree to a planting field; s4, digging a planting hole in the natural soil layer, and after the planting hole is dug, spraying a layer of liquid soil curing agent on the bottom and the inner wall of th