Prefabricated module and retaining wall formed by same

The invention relates to a prefabricated module and a retaining wall formed by the same. One end of a first straight face of the prefabricated module is connected with one end of a first arc face, the other end of the first arc face is connected with one end of a second arc face, and the other end of the second arc face is connected with one end of the first straight face. The first straight surface and the first cambered surface are positioned on the same semicircle; the second cambered surface is sunken inwards; the radians of the first cambered surface and the second cambered surface are consistent; one of the upper and lower ends of the first cambered surface is provided with an arc-shaped first tenon structure, and the other end is provided with a first mortise structure; the first tenon structure and the first mortise structure are consistent in radian; the arc length of the first tenon structure is smaller than that of the first mortise structure. The retaining wall is formed by assembling a plurality