Abstract: To investigate the stable operation conditions of a hydraulic-driven floor-type wind turbine system with long transmission pipeline, the effects of its system parameters on the system resonance were explored, based on which a mathematical model was established for the main drive system, and subsequently the resonance excitation sources were studied from the aspects of energy input, hydraulic components and load output etc., while factors influencing the pressure ratio of the system were analyzed, thus the influence of various parameters on the system resonance were determined. Results illustrate that the parameters, such as the tube diameter, tube length and oil viscosity, have a great influence on the amplitude of pressure ratio, while the movement viscosity and volume modulus also affect the operating frequency of the system; the system resonance frequency exhibits in the form of odd multiples of the fundamental frequency.