Fish farm 100 equipped with an automatic washing filter according to the present invention is configured as follows. A water tank 110 in which seawater or fresh water is filled and fish are farmed, and a filtering tank 120 in which water of the filtered tank 110 is disposed and filtered on the side of the water tank 110, and a side of the filtering tank 120 Arranged in the active tank 130 to receive the water of the filtration tank 120 to remove unfiltered organic matter, and guiding the water from the water tank 110 to the filtration tank 120, the filtration tank 120 In the fish farm including a drain pipe 300 for dropping water from the top of the； The first support 601 fixed to both sides of the upper end of the filtration tank 120 so as to stand on one side of the drain pipe 300, and a first roller 603 mounted to rotate on the first support 601 on both sides. , The second support 605, which is disposed on both sides of the drain pipe 500, is disposed on the outside of the filtration tank 120 so as to correspond to the first support 601, and on both sides of the It is mounted to rotate on the second support 605, the second roller 607 corresponding to the first roller 603, and the first roller as being connected to the first roller 603 and the second roller 607 ( 603) or a second roller 607, a mesh 609 formed to be wound to filter contaminants, and a band shape connected to both sides of the mesh 609, the first in a free state The coil spring 611 formed to be wound on the roller 603 and the second roller 607 mounted on one side of the second support 605 A motor 613 that supplies rotational force, a C-shaped frame 615 connected to the second support 605 on both sides, and a mesh fixed to the frame 615 and wound around the second roller 607 ( It includes a brush 619 in close contact with 609, and a compression spring 617 interposed between the frame 615 and the brush 619. Therefore, the following effects can be exhibited. Since the mesh 609 is conveyed while being w
