The invention discloses a manufacturing device for V-shaped socket buckling piles. The manufacturing device comprises a socket buckling pile forming machine and an octagonal pile forming machine. The technical scheme lies in that a plurality of cemented soil octagonal piles are manufactured; when the cemented soil strength of the octagonal piles reaches certain degree, a cemented soil socket buckling pile is manufactured at each of the left back part and the right back part of each octagonal pile through utilizing the socket buckling pile forming machine according to the working manner of the socket buckling pile forming machine; and concave trapezoids of the cemented soil socket buckling piles at the left back part and the right back part of each cemented soil octagonal pile are enabled to respectively fit convex trapezoids at the left back part and the right back part of the cemented soil octagonal pile, so that a plurality of combined V-shaped socket buckling piles which are formed through the mutual combination of the cemented soil socket buckling piles and the cemented soil octagonal piles and are used for reinforcement treatment of soft foundations are formed.