Respiration particles can be collected into a dust catcher by an inside inhaling and outside pressing particle collector.The work environment of the grab operator in tun-neling mining was improved when a dust catcher is placed before the working face of the grab operator.The particle movement was affected by the gas flow.The flow field inside and outside the dust collector was simulated.The effect of the operating parameter was analyzed.The numerical results show a good approach to predict the gas flow and particle distribution in the inside and outside of the particle collector.