Fabricated formwork

The invention discloses a fabricated formwork, and relates to the technical field of fishway formwork structures. The fabricated formwork is used for pouring a fishway pond chamber prefabricated beamand comprises a first formwork, a second formwork, a third formwork and a connecting rod, the first formwork and the third formwork are correspondingly and rotatably connected to the two ends of the second formwork, and the first formwork and the third formwork can rotate in a preset angle range relative to the second formwork. When the first formwork and the third formwork oppositely rotate to respective limiting position, the two ends of the connecting rods can be detachably connected to the first formwork and the third formwork, so that the first formwork and the third formwork are locked at the respective limiting position, the first formwork, the second formwork and the third formwork jointly surround a pouring space, and the pouring space is used for accommodating poured concrete toform the fishway pond cham