Engine control method and device, storage medium and electronic equipment

The invention provides an engine control method and device, a storage medium and electronic equipment. The method comprises the steps that the current temperature of gas in a catalytic converter is obtained, and the catalytic converter is used for converting harmful gas exhausted by an engine into harmless gas; under the condition that the current temperature is larger than a first temperature and smaller than a second temperature, the temperature change rate is calculated, the first temperature is the temperature enabling the conversion efficiency of the gas to be larger than a conversion efficiency threshold value, the second temperature is the highest temperature when the catalyst is under the safe condition, and the temperature change rate is the speed of the current temperature changing along with time; and under the condition that the temperature change rate is larger than a change rate threshold value, a target air-fuel ratio is obtained, the engine is controlled to inject fuel gas according to the tar