Abstract: According to the principle of bionics, the biological structure is simplified and applied to the T-type pipeline, and the acoustic modal analysis of the T-type pipe before and after the bionic design is made by using the finite element method. The flow fields of the original pipe and the bionic pipe are calculated by CFD computational fluid dynamics method. Based on the self-built noise experimental platform for circulating water pipeline system, the flow noise of the original T-tube is tested to verify the reliability of the numerical method. The boundary element method is used to compare and analyze the flow noise of the bionic texture pipe and the original pipe. Results show that compared with the original pipe, the proportions of the area of the high velocity region and low velocity region at the junction of the bionic T-type pipe are reduced in the whole fluid domain. The bionic texture greatly reduces the velocity gradient nearby and significantly inhibits the generation of vortex, and the flow field in the outflow section of the bionic tube is more uniform, thus the noise reduction mechanism of the bionic texture of T- type pipe is revealed. At a lower flow velocity, the improvement of flow noise reduction of the bionic pipe is less than 1 dB, so the resultant effect of the bionic texture on the flow noise of the T-type pipe is little at a lower flow velocity. However, at a higher flow velocity, the comprehensive improvement of flow noise reduction of the bionic tube is close to 7 dB, this is very obvious. The application of bionic texture basically does not change the acoustic modes of the T-shaped tube. For the fourth and fifth orders of the coupled mode of bionic tube, there is a slight change, but the change gradually becomes smaller with the increase of the pipe wall thickness; for the control of flow-induced vibration noise, the bionic texture design is only suitable for T-type pipes with thin pipe wall, and the noise reduction effect of the T-type pipe with thick pipe wall is not obvious.