Assembly device for turbine disc and compressor rotor disc of small turbofan engine

The utility model provides an assembling device for a turbine disc and a compressor rotor disc of a small turbofan engine. The assembling device comprises a base, a hollow hydraulic cylinder, a middle jacking pipe, a nut and a center pull rod. The top end of a center rod on a compressor rotor disc is in threaded connection with an internal thread tubular part of a center pull rod, a lifting inner barrel of a hollow hydraulic cylinder rises upwards to push a middle jacking pipe to move upwards, the middle jacking pipe jacks a nut to move upwards, the nut drives the center pull rod to move upwards, and the center pull rod moves upwards to pull the center rod to move upwards. The central rod pulls the compressor rotor disc to move upwards; the central hollow structure of the hollow hydraulic cylinder is reasonably utilized, the central pull rod can penetrate through the central hollow structure, the central pull rod can be in threaded connection with and pull the central rod, axial central force application and