The invention relates to the technical field of wind power generation, and discloses a wind generating set yawing device which comprises a nose. A supporting rod is mounted at the bottom of the nose; fan blades are symmetrically mounted on the vertical side wall on one side of the nose; a rudder plate is mounted on the side wall, far from the fan blades, of the nose through a buffer mechanism; a rudder blade is connected with one end, far from the fan blades, of the rudder plate through a connecting mechanism; the buffer mechanism comprises a buffer slot, two first tension springs, a T-shaped sliding groove, two T-shaped sliding blocks, two connecting rods and a first spring; the buffer slot is formed in the side wall, far from the fan blades, of the nose; the rudder plate is positioned in the buffer slot; the two first tension springs are symmetrically fixedly connected onto the bottom of the buffer slot; the other end of each first tension spring is fixedly connected with the rudder plate; and the T-shaped sliding groove is formed in the side wall, far from the rudder blade, of the rudder plate between the two first tension springs. Through the adoption of the wind generating set yawing device, the condition of the damage of the rudder blade and the rudder plate can be prevented, and meanwhile, the rudder blade is convenient to replace.