Water conservancy construction cofferdam device

The water conservancy construction cofferdam device comprises a cofferdam plate, a base is detachably connected to the cofferdam plate through a connecting mechanism, a water blocking groove is formed in the top of the base, a water blocking ring is slidably arranged in the water blocking groove, and a driving spring is fixedly connected to the side, close to the cofferdam plate, of the water blocking ring; the side, away from the water blocking ring, of the driving spring is fixedly connected to the water blocking groove, a storage groove is formed in one side of the water blocking groove, a limiting block is slidably arranged in the storage groove, a limiting groove is formed in the side, close to the storage groove, of the water blocking ring, the limiting block can be inserted into the inner side wall of the limiting groove, and a driving assembly used for driving the limiting block to move is arranged in the storage groove. The danger of constructors in the cofferdam can be reduced. 本发明公开了一种水利施工围堰装置，其包括围