Provided are a control method and control apparatus for an unmanned aerial vehicle, and a computer-readable storage medium. An unmanned aerial vehicle comprises a fixed-wing power system and a rotor-wing power system. The control method comprises: during a deceleration process of the unmanned aerial vehicle switching from a fixed-wing power system working state to a rotor-wing power system working state, determining an observation pitch attitude of the unmanned aerial vehicle; and controlling, according to the observation pitch attitude, the rotor-wing power system, such that the pitch attitude angle of the unmanned aerial vehicle is less than or equal to the maximum pitch attitude angle. Therefore, tilting, caused by instability, of the unmanned aerial vehicle can be avoided during the deceleration process of switching between working states, the stability of switching between working states can be ensured, and flight safety can be improved.