Post-treatment emission monitoring method and device and vehicle

The invention provides a post-processing emission monitoring method and device and a vehicle. The post-processing emission monitoring method comprises the steps that a particulate matter mass signal of a post-processing system is received; calculating a particulate matter quantity value according to the particulate matter mass signal; according to the particulate matter quantity value, whether particulate matter emission of the post-processing system exceeds the standard or not is judged; and engine combustion parameters are corrected according to the after-treatment system particulate matter emission standard exceeding. According to the post-treatment emission monitoring method, the real-time particulate matter emission condition is obtained based on the particulate matter mass sensor signals measured in real time, the risk that emission exceeds the standard is judged according to the particulate matter emission condition, if the risk exists, PN emission is reduced in time through corrective measures on engi