Abstract: Aiming at the difficult problem of high concentration dust governance in excavation working faces of coal mines, a negative pressure multi-stage atomization dust removal system based on dynamic collaborative control is proposed. The core of the technology scheme includes: tapered Venturi structures are adopted at the inlet of the negative pressure air duct to enhance vortex kinetic energy; A droplet-dust collision model is established based on Nukiyama-Tanasawa equation, and a four-stage gradient atomization purification unit is constructed combined with fan-shaped, hollow cone-shape, cavitation, and collision jet nozzles; A closed-loop collaborative operation with the roadheader is realized through dynamic coupling mechanism. The industrial tests of Jiaojiazhai Coal Mine under Jinneng Holdings show that the respiratory dust capture efficiency of the system reaches 95.3%, and the visibility in the operation area is improved to over 15 m, significantly better than the traditional single-stage wet type dust removal system (with a dust reduction rate of <80%); The water recycling utilization rate is as high as 87.3%. This system effectively improves the accurency and adaptability of dust removal, reduces operating costs, avoids muddy working faces, and provides reliable support for efficient dust governance in excavation faces of mines, which has significant application value.