Ammonia leakage control method, device and equipment

The invention discloses an ammonia leakage control method, device and equipment. The ammonia leakage control method, device and equipment are used for controlling ammonia leakage and avoiding the situation that an over 1.2 alarm fault is triggered by NH3 leakage. The method comprises the steps that if it is determined that a vehicle is switched to a second vehicle speed from a first vehicle speed, the first vehicle speed is lower than a first speed threshold value, and the second vehicle speed is higher than a second speed threshold value, the currently-monitored ammonia storage value is obtained, and the difference value between the second speed threshold value and the first speed threshold value is larger than a change threshold value; if the ammonia storage value is lower than a first storage threshold value, the urea injection amount is adjusted so as to increase the ammonia storage value; if the ammonia storage value is higher than a second storage threshold value, the urea injection amount is adjusted s