The embodiment of the invention discloses a low-noise paddle for a rotor craft and relates to the technical field of aerodynamics. The production cost and the structural strength of the paddle are guaranteed, meanwhile, the aerodynamic efficiency is improved, and noise is lowered. The low-noise paddle comprises a smooth-extending section, a sweep-forward section, a sweepback section and a sweepback lower reverse section. The sweep-forward section, the sweepback section and the sweepback lower reverse section are located on the outer side of the paddle. The structure of the outer side of the paddle is a sweep-forward and sweepback structure. The smooth-extending section smoothly extends to the outer side from a start point to the position with the assigned radius to connect the sweep-forward section, wherein the start point is the connecting position of the paddle and a paddle hub. The sweep-forward section is connected with the smooth-extending section, the sweepback section is connected with the sweep-forward section, and the sweepback lower reverse section is connected with the sweep-forward section. The low-noise paddle is suitable for the rotor craft with the low noise.