Coal seam gas extraction device

The utility model discloses a coal seam gas extraction device, and relates to the technical field of gas extraction. The coal seam gas extraction device comprises a moving device, two pipeline fixing devices are fixedly installed at the top end of the moving device, and the two pipeline fixing devices are located on the same horizontal line; according to the coal seam gas extraction device, the moving device is arranged, a moving base can drive a pipeline fixing device to move, and an electric push rod in a driving box can drive a ground contact plate to gradually support the moving base away from the ground; a driving motor in the mounting box is matched to promote a driven gear to link a sleeving rod through a driving gear so as to drive a positioning nail to penetrate through a ground contact plate and finally insert into the ground, so that the movable base can be fixed at the current position after completing movement, and the situation that mounting is completed in a pre-embedding mode in a comparison s