Abstract: The drawbacks of traditional seawater aquaculture methods have gradually become prominent, leading to the development of offshore aquaculture platforms. In response to the characteristics of the operating sea area, operating process, and equipment configuration of offshore aquaculture platforms, noise measurement and analysis were conducted on the "Hengyi 1" aquaculture platform in Zhanjiang Bay Laboratory in Leizhou Bay. The analysis results indicate that the main noise sources of the breeding platform are the generator and the cold storage compressor. When the generator is working, multiple spectral lines will be formed in the low frequency range below 200 Hz, and the peak of the sound pressure spectrum will appear around 25 Hz. The operation of the cold storage compressor mainly increases the underwater noise intensity below 1000 Hz, but does not form multiple spectral lines in the low frequency range like the engine operation. During the operation of the aquaculture platform, the overall underwater noise intensity is relatively low, about 5-20 dB higher than the background noise, and the noise spectral lines are mainly distributed in the mid to low frequency range below 1000 Hz. The underwater noise intensity on the left side of the platform is the highest, followed by that inside the net cage, while the noise intensity on the right side is slightly lower than that inside the net cage. Due to interference from the sea surface, the underwater noise intensity of the platform increases with depth. The analysis results can serve as a reference for expanding the application research of marine environment and offshore aquaculture platforms.