Ships use anti roll fins to reduce ship roll and enhance passenger comfort. At present, there is a lot of research on the performance improvement and system control of anti roll fins, but less attention has been paid to the water generated noise around anti roll fins. To explore the underwater radiation noise characteristics and propagation laws of anti roll fins, a radiation sound analysis model for anti roll fins was established. Based on the data obtained from unsteady CFD calculations, pressure, velocity, density and other sound source data were extracted, and the FW-H equation was called to obtain the sound pressure characteristics at the specified position. Numerical analysis was conducted on the effects of factors such as airfoil, incoming flow velocity, angle of attack, span length, and fin area on the underwater radiation noise of anti roll fins, providing a theoretical basis for the development of low radiation noise anti roll fins.