Water-stopping prefabricated open caisson well section

The utility model discloses a waterstop prefabricated open caisson well section which comprises a plurality of well section bodies which are sequentially spliced and provided with tongue-and-groove structures, twisted steel is embedded in one end face of each well section body, the end portion of each twisted steel extends out, a threaded sleeve is embedded in the other end face of each well section body, and each threaded sleeve is provided with a slurry overflow opening and a slurry injection opening. A plurality of protruding connecting ribs are further arranged on the periphery of the threaded sleeve, and the connecting ribs and the threaded sleeve are embedded in the well section body together. A water-swelling water stop rubber ring is arranged between every two adjacent well section bodies; the prefabricated open caisson well section is simple in structure and easy to manufacture and assemble, each well section body can be produced in a prefabricated mode and assembled on a construction site, every two