Anti-impact netty bag for sea netcage

The utility model discloses an anti-impact netty bag for sea netcage, comprising a net cover, a net bottom, a net main body and a sinker, wherein, the net cover and the net bottom consist of a round deeping, a balsh fixed at the edge of the deeping and manropes symmetrically distributed and fixed on the deeping; the diameter of the net cover is more than that of the net bottom; the net main body consists of the truncated cone-shaped net body of big top and small bottom, an upper and lower balshes fixed at the edge of the upper and lower calibers of the truncated cone-shaped net body, side manropes symmetrically distributed and fixed on the net body and transverse manropes fixed on the net body; the balsh of the net bottom and the lower balsh of the net main body are fixed through transfixion, and the balsh of the net cover and the upper balsh of the net main body are also fixed through transfixion; the net cover, the net bottom and the net main body are formed into a closed bag body; in addition, the sinker is fixed on the bottom of the side manrope. The utility model can reduce volumetric losses of netty bag during netcage being under the impact of water flow and avoids damage to cultured fishes caused by deeping stacking, thereby having extensive application in sea-water-culture netcage.