The invention discloses an image-method particle-size analyzer, which has the characteristics that a digital camera, a micro-objective lens, reflection light sources, a sample cell or a glass slide, a microspur adjusting supporter and a transmission light source are sequentially arranged on the particle-size analyzer from the top down, wherein the reflection light sources and the transmission light source all adopt light-emitting diodes; the sample cell or the glass slide is arranged on the microspur adjusting supporter; when measurement is performed, a clear image can be obtained by adjusting the microspur adjusting supporter; if the transmission light source is lighted and the reflection light sources are not lighted, the transmission method is used for measurement; if the reflection light sources are lighted and the transmission light source is not lighted, the reflection method is used for measurement; and the micro-objective lens, a light-emiting light source and the sample cell constitute an integral component, and the integral component can be conveniently detachably connected with the digital camera to constitute the image-method particle-size analyzer. The invention has the beneficial effects that the size of the image-method particle-size analyzer can be greatly reduced by adopting the structure, and a protable minitype image-method particle-size analyzer with wide particle-size measurement range is constituted.