The invention provides a control method for improving long
idle speed adaptability of an engine, which comprises the following steps: S1, judging whether the engine is in a parking
idle speed state or not, if so, entering the next step, and if not, keeping the original state; s2, judging whether idling time is too long or not, if yes, entering the next step, and if not, keeping the original state; s3, the rotating speed of the engine is temporarily increased; s4, judging whether the
machine is temporarily stopped, if so, entering the next step, and if not, keeping the original state; s5, temporarily stopping the
machine; s6, judging whether to restart or not, if so, entering the next step, and if not, keeping the original state; and step S7, restarting. The idling time of the engine is shortened, the long idling adaptability of the engine is further improved, meanwhile,
electricity utilization safety is guaranteed, the air conditioner using requirement of a user is met, and the vehicle using experience is improved.