The invention discloses a double-convex V-shaped drilling machine. A first front convex V-shaped tool post, a first rear convex V-shaped tool post, a second front convex V-shaped tool post, a second rear convex V-shaped tool post, a front concave V-shaped tool post and a rear concave V-shaped tool post cut soil bodies at the lower ends of the first front convex V-shaped tool post, the first rear convex V-shaped tool post, the second front convex V-shaped tool post, the second rear convex V-shaped tool post, the front concave V-shaped tool post and the rear concave V-shaped tool post correspondingly in the rotation process. The right end is cut to form a convex V-shaped end by the second front convex V-shaped tool post and the second rear convex V-shaped tool post in the rotation process. The cut-off soil bodies are mixed in mud, high-pressure water is injected continuously, the mud flows out of a hole continuously, a hole with each of the left end and the right end provided with two convex V-shaped ends is formed in the downward pressing process of a drill rod, concrete is poured into the hole, and a concrete pile is formed.