Disclosed is a variable-stiffness stator end reinforcement structure in the form of a combined cone-shaped elastic cushion comprising a radiation distribution reinforcing structure (1) and an annularreinforcing structure (2), the invention can be applied to the modification treatment of the stator end of the generator which does not conform to the standard, the combination of the radial distribution stiffening structure and the annular stiffening structure enables the upper stator bar and the lower stator bar to be tightly fixed together, at the end of the stator, a cage-like reinforce structure with high structural stiffness is formed. The whole stiffness of the stator winding end can be effectively improved, and the compression amount of the conical elastic cushion can be adjusted afterthe binding structure solidifies, so that the elliptical vibration frequency of the end can be conveniently adjusted to avoid the inherent excitation frequency range, and the safe operation of the generator can be ensured.