The invention relates to a reclaimable drilling rig device which mainly comprises an elastic clamp stop head, an elastic clamp chamber, a hole expanding opener and an outer pipe that are connected through threads to form an integral outer pipe; a recycling pipe in the outer pipe is connected with an elastic clamp frame and an elastic clamp seat through a second elastic cylindrical pin; a first spring sleeve is sleeved in a positioning pressure block which is positioned in a spear dragging head through a spear dragging seat; two elastic clamp clippers are mounted in pairs and positioned in therecycling pipe through a first elastic cylindrical pin; the elastic clamp frame is connected with a first joint through threads; the first joint seat is arranged on a suspending ring and is arranged on a seat ring; a third joint is connected with a second joint through threads, the second joint is connected with a joint through threads; and a shaft penetrates into the third joint, and an inner pipe is connected to a fourth joint through threads. When a rock core is extracted, the inner pipe is dragged out without dragging out the drilling jig, which is safe and reliable; the material processing difficulty is low, and the cost is controllable; and the working efficiency is greatly improved and the construction cost is reduced.