The invention relates to a fine dust particle convergent resonant cavity based on multiple sensors, and belongs to the field of electrostatic dust collection. The fine dust particle convergent resonant cavity mainly aims to extend the standing time of fine particles in a convergent electric field in limited space, so that the convergent effect of the fine particles is increased, and the dust collection rate is increased. The fine dust particle convergent resonant cavity is composed of a lower slideway, a tractor, an upper slideway, a push-pull rod, a compression plate, an upper cavity wall, aleft positive convergent plate electrode, an upper pressure sensor, a branch outlet flue left wall, a branch outlet flue, a branch outlet flue right wall, a branch flue outlet electromagnetic valve, aparticle distribution sensor, a right negative convergent plate electrode, filter cloth, a right cavity wall, a lower pressure sensor, a right positive convergent plate electrode, a branch flue inletelectromagnetic valve, a branch flue inlet right wall, a branch flue inlet, a branch flue inlet left wall, a left negative convergent plate electrode, a lower cavity wall, a single chip microcomputer, a first resistor, a first triode, a first relay, a second resistor, a second triode and a tractor stepping motor. The fine dust particle convergent resonant cavity is mainly used in the field of theelectrostatic dust collection.