Construction method for building breakwater through geotextile tube bag

The invention discloses a construction method for building a breakwater through a geotextile tube bag. A breakwater core building method includes the specific steps that (1) holes are formed in the geotextile tube bag at intervals in the length direction, ropes penetrate through the holes to bind the geotextile tube bag on a control lever, and the geotextile tube bag is craned through the control lever to be transferred to a breakwater construction position; (2) a sand filling opening of the geotextile tube bag is connected with a sand filling tube; (3) the geotextile tube bag is pressed to the construction position by pressing the control lever, the periphery of the geotextile tube bag is pulled and fixed an auxiliary mode through the ropes, the geotextile tube bag is kept to be located above the water surface, and the sand filling opening is kept downward; (4) in the sand filling process, pressing to the control lever is relieved and pulling of the ropes is relieved until the geotextile tube bag can be kept stable in water, then pressing to the control lever is ended, the auxiliary pulling ropes are cut off, and the geotextile tube bag glides to roll to the target position in water; (5) connection between the sand filling opening and the sand filling tube is ended, and the sand filling opening is closed. The construction method has the advantages of being high in construction success rate, high in efficiency and low in dangerousness.