Pipe jacking large boulder cutting device

The utility model discloses a pipe-jacking large boulder cutting device which comprises a cutting machine body, supporting rods are fixedly connected to the two sides of the top of the cutting machine body, a fixing rod is connected to the tops of the supporting rods in a penetrating mode, a ventilation pipe is fixedly connected to the top of the fixing rod, and a dust removal component is arranged at the top of an inner cavity of the ventilation pipe. The end, close to the driving component, of the ventilation pipe is fixedly connected with a dust inlet cover used for enlarging the dust inlet range. Buffer components are symmetrically arranged at the bottom of the ventilation pipe and located on the top of the supporting rod. The structural design that the compression springs and the fixing screws are combined is utilized, the supporting rods are arranged on the two sides of the top of the cutting machine body, the buffering components on the tops of the supporting rods can avoid vibration when the fan blade