Mixing is a ubiquitous motion in the ocean, which plays an important role in climate change and matter distribution. Seismic Oceanography is a new discipline in recent 10 years; it has been widely applied to Physical Oceanography, because it has the advantage of high spatial resolution. Seismic reflection data were used in this study, along with slope spectral method. We obtained the dissipation rate and diffusivity of turbulence interval and internal wave interval respectively in the Kuroshio (located in the east of the Luzon Strait). The results show that the average dissipation rate from 200- to 800-m depth in this profile is 10~(-7.0)W·kg~(-1), and the average diffusivity is 10~(-3.3)m~2·s~(-1), which is about 1-2 order of magnitude higher than the average value in the ocean 10~(-5.0)m~2·s~(-1). This result is consistent with previous mixing observations in the Luzon Strait. There is a big difference in diffusivity spatial distribution between turbulence interval and internal wave interval: the region where strong current occurs is consistent with that of high turbulence diffusivity in the profile, from which we can infer that this place may be the periphery of mesoscale eddy; its sub-mesoscale instability can strengthen the destabilization and then lead to strong mixing. The high internal wave diffusivity appears near the Luzon Arc, which indicates that the internal wave breaking occurs when it meets the island arc, leading to strong internal wave mixing.