The invention discloses a snakelike armored anchor rod and a construction method thereof. A rod body is arranged to comprise multiple sections of hollow cylinders which are adjacent sequentially frontand back, for every two adjacent cylinders, the front portion of the cylinder on the rear portion is inserted into the rear portion of the cylinder on the front, and is in swing connection with the rear portion of the cylinder on the front, two adjacent cylinders can relatively swing, and the rod body can be bent to form a curve shape according to needs. Compared with an existing linear anchor rod, the anchor rod has the beneficial effects that firstly, when the snakelike armored anchor rod bears loads, the snakelike armored anchor rod has the mutual effect of the curve rod body and a surrounding rock body except for the friction effect between a grouting body and the surrounding rock body, and anchorage and stability of the snakelike armored anchor rod can be improved; and secondly, in the grouting process, slurry passes through the gap between two adjacent cylinders to evenly flow out to enable a whole curve drill hole to be filled, the whole curve drill hole can be more sufficiently filled, and the anchor rod supporting strength can be improved.