Dam

The invention discloses a dam. The dam comprises dam bodies built on the two sides of a river bank, one or more extending parts are arranged on each dam body side by side, a gap cavity is formed between every two adjacent extending parts, one or more rotating cavities are formed in the face, facing a river channel, of each dam body side by side, and a sealing baffle is hinged to the interior of each rotating cavity. Each gap cavity corresponds to one sealing baffle, a protruding part is arranged on the face, deviating from the riverway, of each sealing baffle, a planting cavity is formed in the face, extending towards the interior of the corresponding sealing baffle, of each sealing baffle along the corresponding protruding part, crops are planted in the planting cavities, and buoyancy pieces are embedded in the sealing baffles. Plants are arranged on the sealing baffle, and the sealing baffle extends towards a river channel, so that the space on a river bank is not occupied, meanwhile, the dam does not block