Air pump control method and device of blood pressure watch and blood pressure watch

The invention relates to the technical field of blood pressure measurement, and provides an air pump control method and device of a blood pressure watch and the blood pressure watch. The method comprises the steps that when the blood pressure watch of a user receives a blood pressure measurement instruction, an optical measurement device is started, and an initial pulse waveform is determined; according to the initial pulse waveform, the initial inflation speed of the blood pressure watch for inflating the air bag is determined; the pulse waveform is continuously detected, and the initial inflation speed is adaptively adjusted according to the waveform ratio of the real-time pulse waveform to the initial pulse waveform; when the real-time pulse waveform cannot be detected, air inflation of the air bag is stopped, and first air pressure information is determined; after the first air pressure information is determined, the air bag is deflated according to the initial inflation speed, the initial deflation speed