DMC-type dust collector based on the main improvement is that the dust into the air to set the two sides of the box, the distribution grid in the cabinets set the deflector plate to form a lateral inlet. Dust and gas into the dust after being grating blocked most of the gas grill plate in the role of diversion into the dust filter chamber and the hopper, the larger inertia of the particles lose energy, and under its own gravity and separated plate after the collision would have fallen into the bottom is captured, play the primary role of dust, thus allowing the filter inlet concentration of up to 500g/m3, no further increase in the primary filter, reducing footprint, saving the investment cost, shabby treatment by the primary air into the filter chamber, were bag filter, purifying exhaust gas through the filter chamber.