基于光散射原理，提出了一种新的测量颗粒粒径大小及分布的方法。与传统的光散射式激光测粒仪不同，本方法以白色光为光源，仅采集一个空间立体角内的散射光能信号，经反演算后求得被测颗粒的粒径及其分布。给出了这一方法的理论分析、数值模拟以及实验研究。 Based on the principle of light scattering, a new method for measuring the size and distribution of particle size was proposed. Different from the traditional light scattering laser particle sizer, this method uses white light as the light source, and only collects the scattered light energy signal in a spatial solid angle, and obtains the particle size and distribution of the measured particles by back calculation. The theoretical analysis, numerical simulation and experimental research of this method are given.