Earth auger is a kind of suitable for building fast into the hole infoundation engineering construction machinery, applicable to electric power,telecommunications, municipal, high-speed, high-speed, highway, construction,petroleum, timber and other column bar above the layer of soil pile and pier,drilling engineering of forest tree, multi-functional characteristics. Itsconstruction of high efficiency, is the electric power, communication,municipal, railway, highway, construction, petroleum, trees, such as the idealfoundation construction equipment. Spiral drill is suitable for the fillingsoil, clay, powder soil and silt layer, sand layer and the drilling short screwcan't contain part of the pebble and gravel stratum. Using core drill bit, canalso be embedded in rock.