Concrete filling pile splicing structure of external package pile top

The invention discloses a concrete filling pile splicing structure of an external package pile top. A groove with a cross plate anti-shear key embedded is formed in the center of the top face of a pile body, a continuing main rib and an existing main rib are in lap joint and welded into a whole, an added bottom end U-shaped main rib is annularly arranged on the outer side of the continuing main rib, the bottom end of the added bottom end U-shaped main rib is bent, and the added bottom end U-shaped main rib and the upper portion of the existing main rib are in lap joint and welded into an integral structure. The structure has the beneficial effects that the bottom elevation of the continuing pile body is lower than the top face of the existing pile body, the pile body is reinforced relativeto the weak area, the contact area between the two pile bodies can be greatly improved, the stress concentration is avoided, the cross section area of the pile body on the pile top can be increased,the pile body stress is re