An end plate, comprising an end plate body (1), wherein the end plate body (1) is provided with a front end surface (11), a back end surface (12), an inner peripheral wall (13) and an outer peripheral wall (14), the end plate body (1) is provided with a plurality of locking holes (15), and the outer peripheral wall (14) of the end plate body (1) is provided with embedding grooves (16). Hoop parts with U-shaped cross sections (2) connect two adjacent end plates together via the embedding grooves (16). Also provided are a pile connecting mechanism, a connecting mechanism for tensioning a reinforcement cage, a concrete pile and a manufacturing method.