Pre-stress assembled underground continuous wall and preformed block thereof

The utility model discloses a prestressing assembly type underground continuous wall, which is assembled by prefabrication building blocks. The prefabrication building block is pierced with prestressing tendons, and the prefabrication building blocks are connected mutually via the anchoring of the prestressing tendons. The prefabrication building block is provided with horizontal and vertical pore paths through which the prestressing tendons can pass through. The continuous wall adopts prefabrication members totally without scene secondary casting and maintenance for concrete, so the scene construction of the concrete can be avoided entirely and duration can be shortened greatly. The prestressing can enhance the totality of the structure and save steel simultaneously. The prefabrication building blocks by which the prestressing assembly type underground continuous wall can be formed are also disclosed, and the building block is provided with horizontal and vertical pore paths.