Engaging cross-shaped pile forming machine

The invention discloses an engaging cross-shaped pile forming machine which comprises a concave V-shaped head pile machine and a square pile machine. Multiple cemented soil square piles are manufactured. When the strength of cemented soil of the square piles reaches a certain degree, a concrete concave V-shaped head pile is manufactured at each of the left portion, the right portion, the front portion and the rear portion of each square pile through the concave V-shaped head pile machine according to the working manner of the above concave V-shaped head pile machine; concave V-shaped parts of the concrete concave V-shaped head piles at the left portion, the right portion, the front portion and the rear portion of each cemented soil square pile coincide with convex V-shaped parts at the left portion, the right portion, the front portion and the rear portion of the cemented soil square pile; and therefore a cross-shaped pile formed by combining the multiple concrete concave V-shaped head piles and the cemented soil square piles is formed and used for strengthening treatment of a weak foundation.