The invention relates to a culturing method of high-density cultured fish on a large water surface. A high-density culturing pond is arranged, and both the water inlet end and the water outlet end ofthe high-density culturing pond are communicated with the water body of the large water surface; partition walls are arranged on both sides of the high-density culturing pond, micropipes or aerated stones or aerated stone bundles are evenly distributed along the bottoms of the partition walls, and anti-escape nets are arranged at the water inlet and water outlet of high-density culturing pond respectively; the water inlet end of the high-density culturing pond is provided with a water pushing device and a bait feeding device, the water pushing device includes a horizontal pushing plate which forms an angle of 50 degrees to 70 degrees with the water surface, the horizontal pushing plate is provided with micropipes or aerated stones or aerated stone bundles, gas passes through the micropipesor aerated stones or aerated stone bundles to act on the horizontal pushing plate, and under the pushing of a reactive force, the water body of the large water surface is sent to the high-density culturing pond; the recycling of the water body of the large water surface in the high-density culturing pond relatively indirectly increases the utilization of space of the culturing water body, so thatlarge culturing yield in a small culturing space is achieved and good ecological and economic benefits are created.