The invention particularly relates to a tubular pile body butt joint construction method. The method is characterized in that an assembly tool is involved, and further comprises the following steps that before a first section of tubular pile (3.1) is in butt joint with a second section of tubular pile (3.2) after being constructed, limiting rods (2) are welded on a hoop (1) of the outer wall of the tubular pile (3.1), then the tubular pile (3.2) is lifted for butt joint work, when the distance from the lower end part of the tubular pile (3.2) subjected to lifting to the top of the half part, not provided with the limiting rods (2), of the tubular pile (3.1) is 5 centimeters or so, the tubular pile (3.2) is pushed, so that the outer wall of the tubular pile (3.2) is tightly attached to thethree limiting rods (2) welded to the outer wall of the hoop (1), the lifted tubular pile (3.2) can be placed down, and the tubular pile (3.2) and the tubular pile (3.1) are attached to each other. Through the tool and the construction method, the butt joint work of a pile body can be quickly and efficiently completed, the butt joint accuracy is high, the operation duration can be effectively shortened, and the welding quality is improved.