The invention provides an edge hole finalization type railing and a construction method thereof. The edge hole finalization type railing comprises upper cross rods, lower cross rods, longitudinal rods and screw rods, wherein the two ends of the longitudinal rods are separately and detachably connected with the upper cross rods and the lower cross rods, and the two ends of the upper cross rods and the lower cross rods are hollow, and the upper cross rods and the lower cross rods are connected with the screw rods. The screw rods are provided with nuts, the other ends of the screw rods are connected with reserved mounting holes in the edge hole, the lower ends of the longitudinal rods are connected with toe boards, the interior of the toe boards is hollow, and weight materials are put into the toe boards, so that the stability of the whole device is increased. The edge hole finalization type railing is high in finalization, convenient to install and disassemble and firm and reliable, the subsequent construction progress is not affected, the high safety factor is achieved, the construction efficiency can be improved, labor is saved, the edge hole finalization type railing is convenient to turn over and convenient to store and transport after disassembling.