Staged mixed local ventilation method

The invention provides a staged mixed local ventilation method, and belongs to the technical field of roadway ventilation. Comprising the following steps that S1, a first ventilation system is arranged, specifically, the first ventilation system is arranged in a tunneling roadway, the first ventilation system comprises a draw-out type ventilator, an air suction barrel and a first air outlet barrel, the first air outlet barrel passes through an air door, and an air opening of the first air outlet barrel is located in an air return roadway; s2, a second ventilation system is arranged, specifically, the second ventilation system is arranged in the tunneling roadway, and the second ventilation system comprises a press-in type ventilator and a second air outlet barrel; s3, a ventilator linkage power-off system is arranged; s4, ventilation work is carried out; and S5, monitoring the gas concentration. According to the method, dirty air generated by the working face is introduced into the return airway through the d