A novel electro-hydraulic servo hub machine loading test bench for controllable pitch propeller (CPP) was presented. Thrust, rotational resistance, centrifugal force and rotary vane torque generated by CPP in water at different pitch, rotational speed and speed can be imitated through a multi-channel electric hydraulic force (torque) servo control system. The servo control system could apply static, dynamic, pulsating load or variable load according to a loading spectrum to the hub. A vertical structure was utilized for the loading system, with a massive disk as the foundation bed. The loaded hub was installed upside-down in the center of the disc. Finite element analysis for the key parts of test bench was conducted, as well as the frequency response analysis of electro-hydraulic servo loading system. The experiments demonstrated that the loading test bench could meet the variety of load requirements.