The invention discloses a control method for a full-hydraulic wind-tide hybrid power generator. The method comprises the following control modes that (1) electric pitch control is conducted, a reference voltage value at a rated wind speed is set in a fuzzy PID algorithm preset in a central control unit, a voltage signal of real-time wind speed fed back by an anemorumbometer is compared with the reference voltage value, whether electric pitch operation of pneumatic impellers needs to be conducted or not is decided, and a tide impeller adopts the same control method; (2) rotary speed signals of a first rotary speed torque sensor on a wind energy collector and a second rotary speed torque sensor on a tide energy collector and displacement signals of two variable pumps are input into the central control unit and handled through the fuzzy PID algorithm, and the opening degree of a flow divider is controlled according to the handling results; (3) best power tracking control is conducted; and (4) the hydraulic system pressure is adjusted and controlled. Through the method, control is flexible, the reliability is high, and the power generation efficiency is high.