The invention discloses an aeration pond with a planetary stirring mechanism. The aeration pond comprises a pond body, a water feeding pipe, a water discharging pipe and an aeration plate; the bottomof the pond body is fixedly connected with the aeration plate, and the top of the pond body is fixedly connected with a fixed frame; the lower surface of the fixed frame is fixedly connected with a motor, and a rotary shaft penetrates through the top of the fixed frame; the shaft extending end of the motor is connected with the upper end of the rotary shaft through a transmission mechanism; a sungear sleeves the middle of the rotary shaft, and a gear ring is fixedly connected to the inner wall of the pond body; planetary gears are annularly distributed on the periphery of the sun gear, and the lower surfaces of the planetary gears are fixedly connected with stirring shafts; stirring blades are distributed on the stirring shafts, and stirring rods are distributed on the rotary shaft; and the right side wall of the fixed frame is fixedly connected with an air blower. According to the aeration pond, sewage on the bottom layer can be aerated, meanwhile air is conveyed to the rotary shaft,sewage on the middle layer is aerated, by arranging a planetary gear train and adopting revolution and meanwhile autoroatation of the planetary gears, the sewage is stirred through the stirring blades, the sewage is further mixed, and the aeration efficiency is further improved.