The invention relates to a dual-elasticity coefficient spine reduction device, the dual-elasticity coefficient spine reduction device is used for being implanted into a spinal tissue, which comprises: an outer sleeve part, which is provided with an opening containing space, an inner liner part, which is contained in the containing space, and one end thereof is suitable to be connected with an implantation tool. The elasticity coefficient of the inner liner part is between 100 to 250GPa, and the elasticity coefficient of the outer sleeve part is between 2 to 22GPa. The inner liner part is contained in the outer sleeve part, after that, the reduction device is implanted into the spinal tissue by the implantation tool, and the outer sleeve part is contacted with the spinal tissue.