The invention discloses a hybrid electric vehicle power source power limiting method, belonging to the technical field of hybrid electric vehicle control. The method comprisesdetermining the upper andlower limits of battery output power and determining the upper and lower limits of motor output torque. The method takesthebattery, conditions of use of electric machines, fault state and its own characteristics for battery charging and discharging power, the output torque limit of the motor into account, whichcan effectively prolong the battery, the service life of the motor and improve the safety of the battery and the motor in the process of use, and at the same time output the larger power as far as possible to ensure the power and fuel economy, which is very important for the safety of passengers and vehicle components in the process of driving.