Underwater mud layer recyclable multi-stage telescopic fixing leg

The invention provides an underwater mud layer recyclable multi-stage telescopic fixing leg comprising a guide frame, a plurality of telescopic legs, a plurality of support assemblies, and stop pins. The guide frame is equipped with a plurality of vertical guide columns. Each telescopic leg is fixedly installed to the side of the corresponding guide column of the guide frame; the telescopic legs extend slantingly downward; and each telescopic leg includes an outer cylinder, a middle cylinder and an inner cylinder, wherein the middle cylinder and the inner cylinder can axially move relative to the outer cylinder, the middle cylinder is provided with a plurality of guide slots, a telescopic rope is placed at the bottom of the inner cylinder, the inner cylinder and the middle cylinder can be sequentially retracted into the outer cylinder and stacked by pulling the telescopic rope, and the bottom of the inner cylinder is equipped with a fixing pin. Each support assembly includes two support cylinders and a connecting support cylinder of which one end is fixed between the two support cylinders, wherein the support cylinders are fixed between the corresponding guide column and the corresponding outer cylinder, and the other end of the connecting support cylinder is fixed to the corresponding outer cylinder. Each stop pin is disposed in a pair of pin holes in the bottom of the corresponding outer cylinder, and clamps the corresponding fixing pin to stop the middle cylinder and the inner cylinder stacked in the corresponding telescopic leg from extending automatically.