在国外现有研究的基础上，从理论上推导出了悬浊液透光率脉动值的解析式。对该解析式的进一步研究表明，悬浊液透光率脉动值主要与悬浊颗粒大小有关，颗粒个数浓度的影响较小，悬浊颗粒凝聚时透光率脉动值总是增大的。给出了单一粒径组成和具有一定粒径分布的悬浊液，根据其透光率脉动值计算颗粒平均粒径的解析式。 Based on the existing researches abroad, the analytic formula of the pulsation value of the transmittance of the suspension is theoretically deduced. Further analysis of this analytical formula shows that the pulsation value of the transmittance of the suspension is mainly related to the size of the suspended particles and the influence of the number of particles is small, and the pulsation value of the transmittance always increases when the suspended particles agglomerate. A single particle size composition and a certain particle size distribution of the suspension, according to the transmittance value of the pulverized particles to calculate the particle size of the analytic formula.