The invention discloses a supporting double-concave and single-convex interlocking water-stop pile. Including the pile body and the pile tip, the pile tip is provided with anchor reinforcement and structural reinforcement, the pile body includes the upper section pile, the middle section pile and the lower section pile, the pile top of the upper section pile is provided with pile cap and structural reinforcement, and the lower end of the upper section pile is provided with anchor reinforcement The upper end of the middle pile is provided with a threaded anchor hole, and the lower end of the middle pile is provided with an anchor bar; the upper end of the lower pile is provided with a threaded anchor hole, and the lower section of the lower pile is provided with a pile tip; Three sides are double concave and single convex. The beneficial effect of the present invention is: the supporting and interlocking water-stop pile adopts the long-line pedestal single-mode evenly distributed reinforcement, the overall tensile stress, the three sides of the supporting and interlocking water-stop pile are double-concave and single-convex, and spiral stirrups are distributed. It can be used for long-line table production, saving labor, labor, environmental protection, high productivity, good product quality, and helps the product to form a tall and straight shape, with good aesthetics and crack resistance. It is suitable for water stop of ports, docks and deep foundation pits, anti-corrosion, anti-freezing and thawing.