The invention discloses an oxygen-increasing device for aquaculture ponds. The oxygen-increasing device for the aquaculture ponds comprises a machine frame, floating balls, propeller frames, propellers and an oxygen-increasing assembly, wherein a plurality of floating balls are arranged on the machine frame utilizing connection of connecting rods; the propellers are arranged on the bottom wall ofthe machine frame utilizing the propeller frame; and the oxygen-increasing assembly is arranged on the lower bottom surface of the machine frame in a rotatable mode, and the oxygen-increasing assemblyis connected with an oxygen pipe. According to the oxygen-increasing device for the aquaculture ponds, the oxygen-increasing assembly is arranged to be rotatable, so that uniform dispersion of oxygenin water can be improved, moreover, a water stirring frame is arranged, so that stirring of water is realized, contact area between water and oxygen is increased, and oxygen-dissolving effect of water is increased; in addition, an outer air-releasing bag and an inner air-releasing bag are arranged, so that after passing through a hollow rotating shaft, a gas first passes through the inner air-releasing bag, and is dispersed out from the lower half part of the inner air-releasing bag, and then is evenly dispersed out by the outer air-releasing bag, so that uniformity of oxygen dispersion can be effectively improved, and oxygen-increasing effect of ponds is improved.