Dust removal mechanism for cutting machine

The utility model discloses a dust suppression mechanism of a cutting machine, which comprises a cutting machine case, a driving gear driven by a motor, a transmission mechanism, a fan shaft and a fan, wherein, the cutting machine case covers the front area of the working face of the cutting machine; the driving gear is connected with the transmission mechanism which is connected with the fan shaft; an air outlet which is corresponding to the air-out side of the fan is arranged on the cutting machine case, the air outlet is connected with a blast pipe. The transmission mechanism comprises a driving bevel gear, a cylindrical gear and a driven bevel gear of a coupling shaft gear and the axle end part of the coupling shaft gear is installed on a first bearing which is fixedly installed in the cutting machine case; the driving gear is meshed with the cylindrical gear while the driving bevel gear is meshed with the driven bevel gear which is fixedly connected with the fan shaft; one end of the fan shaft is install