Particle counting method and system

A particle counting method, is characterized in that, it comprises following steps:

• S1) generating a light channel for detecting particles;
• S2) acquiring optical signals scattered by the particles passing through the light channel and converting the optical signals into pulse signals;
• S3) according to the pulse signals, obtaining distances between closest positions which are closest to centers of the light channel in paths along which the particles pass through the light channel and the centers of the light channel;
• S4) according to an optical density distribution of the light channel, compensating amplitudes of the pulse signals of the particles when passing through the closest positions such that the compensated amplitudes of the pulse signals of the particles are equal to amplitudes of pulse signals of particles with same particle diameters when passing through the centers of the light channel;
• S5) screening and counting the particles according to the compensated amplitudes of the pulse signals to realize counting of the particles with respective particle sizes.