Spiral drilling type rotary digging drill

An auger-drilling type rotary drilling rig comprises a main engine of the rotary drilling rig, mast (19) that is connected with the upper part of the rotary drilling rig which is provided with a compression hoisting device (18), a compression wire rope that is extracted from one side of the reel of the compression hoisting device is connected with a tension cylinder which is arranged at the lower part of the mast through a upper and lower mast pulley (4) (5), a pulley under a power head (6), a lower mast pulley (7) (8), a rope wedge sleeve (9). A hoisting rope that is extracted from one side of the reel is connected with the rope wedge sleeve that is arranged at the upper of the mast through an upper mast pulley (1) (2), a pulley above the power head (3). One side of the traction wire rope which is used to lift the power head is connected with the main hoisting device, the other side is connected with the rope wedge sleeve which is arranged at the top of the mast through a supporting pulley (17), the pulley o