The utility model discloses a pipe installation system for river water environment improvement, air supply header perpendicular to river course sets up, and the air feed branch pipe is two at least to along the river, say mutual parallel arrangement, after the inlet end of air feed branch pipe is bent perpendicularly downwards again with the air supply header intercommunication, the tail end of air feed branch pipe seals, the air feed divides the flow table to set up along the extending direction interval of air feed branch pipe, and the air feed divides the flow table by the main entrance, constitute with the integrative a plurality of shunt tubess that set up of main entrance, and the upper end of main entrance is sealed, and lower extreme and air feed branch pipe intercommunication, shunt tubes are on the circumference lateral wall of main entrance to be dispersed the form and distribute, is equipped with a switch on every shunt tubes, and every shunt tubes links to each other through an air supply hose and an aeration dish. Simple structure, pipe installation are in good order, the installation is dismantled and the maintenance measure all makes things convenient for, are exclusively used in river water environment improvement.