River cofferdam diversion construction device

The utility model discloses a river cofferdam diversion construction device. The river cofferdam diversion construction device comprises a pair of cofferdam dams arranged on a riverbed and used for intercepting river water, and a flow guide pipe which runs through the cofferdam dams is arranged on the pair of cofferdam dams to guide the river water at the upstream of one cofferdam dam to the downstream of the other cofferdam dam through the flow guide pipe; a waterproof blanket is arranged on the surface of each cofferdam dam in contact with the river water; a waterproof blanket packages the outer wall of the flow guide pipe. The cofferdam diversion facility fully uses the riverbed, by means of the flow guide pipe, the water from the upstream passes through an engineering influence region in sequence, and meanwhile, the runoff of the section of the river is reduced, and the river infiltration is reduced. By means of the protection of the flow guide pipe, the ordered water drain of the river is not influenced by the construction. The drain function of the river is not influenced, and the influence to the life in the neighborhood is lowered.