Bottom-expanded connecting structure of prefabricated pier and bearing platform

The utility model relates to the technical field of piers, and discloses a prefabricated pier and bearing platform connecting structure with an expanded bottom, which comprises a pier and a bearing platform, the pier comprises an upper supporting part and a lower expanded end, and the supporting part and the expanded end are integrally formed; the bearing platform is provided with a mounting surface arranged upwards, the mounting surface is sunken downwards to form a fixing groove, the expanding end is embedded into the fixing groove, and the outer side wall of the expanding end abuts againstthe inner side wall of the fixing groove; the lower portion of the pier is provided with the expanding end, the bearing platform is provided with the fixing groove used for being embedded into the expanding end, when the expanding end is embedded into the fixing groove, the expanding end increases the sectional area of the pier, the expanding end and the fixing groove are buckled together in a concave-convex mode to enhan