A high-efficiency mining machine for percussing falling-materials without trapping materials. A machine body of the mining machine is provided with a falling-material percussion mechanism (3). The falling-material percussion mechanism (3) comprises an outer-layer-material percussion mechanism (4) and an inner-layer-material percussion mechanism (5). The outer-layer-material percussion mechanism (4) comprises outer-layer-material percussion teeth (4.1). The outer-layer-material percussion teeth are disposed so that materials percussed down by the inner-layer-material percussion mechanism flow out through gaps between the outer-layer-material percussion teeth and/or a discharge hole (8) is reserved in the outer-layer-material percussion mechanism so that materials percussed down by the inner-layer-material percussion mechanism flow out through the discharge hole (8) of the outer-layer-material percussion mechanism. The inner-layer-material percussion mechanism comprises inner-layer-material percussion teeth (5.1). The inner-layer-material percussion mechanism and the outer-layer-material percussion mechanism work with each other to implement percussion and discharge of falling-materials. Also disclosed is a high-efficiency mining method for percussing falling-materials without trapping materials. The mining machine has a simple structure and works in a reliable way.
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