A freezing-type rock cross-measure coal uncovering method based on hydraulic seam cutting is suitable for a rock cross-measure coal uncovering operation in a high-gas outburst coal seam. The method includes following steps: (1) constructing a plurality of water injection holes into a coal uncovering operation surface at a position of the coal uncovering operation surface, wherein a minimum normal distance from the coal seam to the position is not less than 7 m; (2) performing hydraulic seam cutting to the water injection holes through a conventional hydraulic seam cutting technology; (3) when the hydraulic seam cutting is finished, connecting the water injection holes to a gas extraction pipe network to perform gas extraction; (4) when the content of gas in the coal seam is less than 8 m<3>/t, stopping the gas extraction; (5) constructing a freezing holes and a temperature measuring hole respectively at the two sides of the water injection holes; (6) sealing the holes through a capsule hole-sealing device; (7) injecting water into the coal seam through the water injection holes and closing valves when the water injection process is finished to enable the water injected into the coal seam to gradually seep into micro cracks in coal; (8) freezing the coal seam around the water injection holes through a conventional freezing technology to enable free water in the micro cracks in the coal seams to gradually convert from liquid phase into solid phase during the freezing process, so that a strength and an anti-impact performance of the coal are increased and an effect of solidification of the coal seam is achieved; and (9) uncovering the coal seam through a conventional coal uncovering method.