Mass concentration calculation method of humidity-compensated particulate matter monitoring equipment

The invention belongs to the technical field of particulate matter monitoring, and relates to a mass concentration calculation method of humidity-compensated particulate matter monitoring equipment, which comprises the following steps: measuring the relative humidity of the environment, and measuring the number of particulate matter particles of different particle size sections with the particle size below 4 microns in the environment air through the particulate matter monitoring equipment; determining a particulate matter particle number-mass concentration conversion model based on the particulate matter particle numbers of the different particle size sections, the particulate matter particle number-mass concentration conversion coefficients of the different particle size sections and the environment relative humidity; and determining the PM2.5 mass concentration, measured by the particulate matter monitoring equipment, in the ambient air based on the particulate matter particle number-mass concentration con