Hybrid vehicle control method and system under extremely cold condition

The invention discloses a hybrid power vehicle control method and system under the extremely cold condition, and relates to the technical field of hybrid power vehicles. When the temperature of a battery pack is lower than the first preset temperature, starting of an engine is forbidden, at the moment, and even if a user tries to start the engine, the vehicle does not try to start the engine, so that damage to the battery pack caused by trying to start the engine when the engine cannot be started under the extremely cold condition can be avoided; and when the temperature of the battery pack is between a first preset temperature and a second preset temperature, the engine is allowed to be started, but the vehicle is forbidden to run immediately, air conditioner warm air in a passenger compartment is started, air in the passenger compartment is pumped to the battery pack, the temperature of the battery pack is rapidly increased, the vehicle is allowed to run after the temperature of the battery pack reaches the