Construction method for excavating and supporting large-gradient inclined shaft small-section long tunnel

The invention provides a construction method for excavating and supporting a large-gradient inclined shaft small-section long tunnel, which comprises the following steps: excavating an inclined shaft, arranging a wringing ore bucket channel on one side in the inclined shaft, and arranging a slag-adjacent pit slot on one end of the wringing ore bucket channel close to a hole opening of the inclined shaft; a shotcrete material conveying channel is excavated at the top of the intersection of the inclined shaft and the main tunnel to be excavated, and a spiral conveyor is arranged in the shotcrete material conveying channel; lofting and designing an excavation contour line and a shot hole arrangement position; the tunnel face is charged and detonated, and the exploded dangerous rock is transported to a slag yard through a wringing ore bucket channel; carrying out over-excavation and under-excavation inspection on the tunnel face, and lofting the installation position of the temporary support structure at the same