Particulate matter concentration measuring method based on field calibration

The invention relates to the technical field of particulate matter concentration detection, and provides a particulate matter concentration measuring method based on field calibration. Comprising the following steps: connecting a light scattering detection device, a virtual impact cutter and a beta-ray detection device in a gas circuit in series; and the particulate matter concentration measured by the light scattering detection device is calibrated by taking the particulate matter concentration value measured by the beta-ray detection device as a standard. According to the invention, the concentration value of particulate matters can be dynamically and continuously measured on site in real time, and the light scattering detection device can be calibrated on site, so that when the light scattering detection device is used, the deviation of the measurement result caused by large difference between the on-site temperature and humidity and the temperature and humidity values during laboratory calibration can be