A hybrid vehicle control method for controlling a hybrid vehicle having a power generation system in which an engine and a drive shaft are connected and which includes a power generator configured to rotate together with the engine, and a drive system that is connected to the power generation system and driven by receiving electric power supplied from a chargeable battery, comprising: determining a rotational speed command value ( ω G *) for the power generation system in accordance with a state of the drive system; determining a torque command value (T*) for the power generation system such that a rotational speed of the power generation system reaches the rotational speed command value ( ω G *); performing a damping control on the torque command value (T*) to suppress a natural vibration component generated in a connection between the engine and the power generator to calculate a final torque command value (T fin *) for the power generation system; setting the torque command value (T*) as the final torque command value (T fin *) without performing the damping control upon determining a system resonance can occur that is caused by a vibration component different from the natural vibration component; wherein the hybrid vehicle control method is characterized by in the performing of the damping control, calculating a first command value by subjecting the torque command value (T*) to feedforward control to reduce the natural vibration component, determining a disturbance from a difference between a rotational speed measurement value and an estimated rotational speed value estimated based on the final torque command value, calculating a second command value by performing feedback control so that the disturbance is suppressed, and calculating the final torque command value (T fin *) by adding the first command value and the second command value. determining a rotational speed command value ( ω G *) for the power generation system in accordance with a state of the drive system; determining a torque command value (T*) for the power generation system such that a rotational speed of the power generation system reaches the rotational speed command value ( ω G *); performing a damping control on the torque command value (T*) to suppress a natural vibration component generated in a connection between the engine and the power generator to calculate a final torque command value (T fin *) for the power generation system; setting the torque command value (T*) as the final torque command value (T fin *) without performing the damping control upon determining a system resonance can occur that is caused by a vibration component different from the natural vibration component; calculating a first command value by subjecting the torque command value (T*) to feedforward control to reduce the natural vibration component, determining a disturbance from a difference between a rotational speed measurement value and an estimated rotational speed value estimated based on the final torque command value, calculating a second command value by performing feedback control so that the disturbance is suppressed, and calculating the final torque command value (T fin *) by adding the first command value and the second command value.