Automatic multi-stage single-particle impact type sampler and sampling method

The invention discloses an automatic multi-stage single-particle impact sampler and a sampling method. A multi-stage sampling head capable of automatically rotating is developed, and the multi-stage sampling head comprises a spinning multi-stage sampling head, a power and rotation module and a control and display module; the spinning multi-stage sampling head comprises a top cover provided with an air inlet pipe, an upper-layer rotary sample table, a middle cover, a middle-layer rotary sample table, a lower cover, a lower-layer rotary sample table, a sample table rotating shaft and a base provided with an air outlet pipe; and the top cover, the middle cover, the lower cover, the sample table rotating shaft and the base form a complete closed cavity which is used for cutting and collecting particulates with corresponding particle sizes. An automatic sampling mode and a manual sampling mode are provided. The sampler is small, portable, flexible to use and wide in application, can be independently used for automatic sampling of single particles, or can be modularly integrated into a related instrument to be used as a single particle sampling module, is suitable for various sampling scenes, and can be used for daily sampling, human body exposure, vertical particle distribution and the like.