The utility model discloses a hanging body extremely-thin coal seam twin-roll chainless internal traction coal mining machine. A traveling gear of the hanging body extremely-thin coal seam twin-roll chainless internal traction coal mining machine comprises a guide part, a driving part and a supporting part, wherein the driving part is connected with the guide part through a gap bridge which stretches over a scraper conveyor. The driving part is arranged on a coal mining machine side and is hauled by a gear rack mechanism to move. The guide part is arranged on a gob side of the scraper conveyor, and is provided with a track groove which has a semi-enclosed structure. The supporting part is arranged on the coal mining machine side, and a coal mining machine body is supported on the scraper conveyor by supporting legs. According to the hanging body extremely-thin coal seam twin-roll chainless internal traction coal mining machine, the traveling gear is used as a traveling drive of the coal mining machine, a driving end is arranged on the coal mining machine side, a passing shaft for stretching the coal mining machine over the scraper conveyor is eliminated, and a coal passing space is added. The semi-enclosed track groove structure is adopted by a guide side, so that the coal mining machine can be mounted and dismounted easily. The hanging body extremely-thin coal seam twin-roll chainless internal traction coal mining machine is good in coal loading effect, small in body height, and suitable for extremely-thin coal seams.