The turbulent dissipation along with tempera- ture and salinity was measured on board R/V Dong Fang Hong 2 over the shelf break of the East China Sea from March 7 to 9, 2004. Applying the Turner angle, it is found that the ‘diffusive’ double diffusion, salt-fingering, and stable stratification coexist in the upper water column of about 50 m. Below that depth, there exists weak salt-fingering. The turbulent dissipation rates are enhanced along the ray paths of M2 internal tides emanating from the shelf break with values ranging from 1.0×10?9 W·kg?1 to 1.2×10?6 W·kg?1. The corresponding diapycnal mixing rates are from 1×10?6 m2·s?1 to 1×10?2 m2·s?1. The spatially averaged mixing rate over the whole observation section is 2.3×10?3 m2·s?1, which is much larger than 1×10?5 m2·s?1 of the background diapy- cnal mixing rate in the open ocean. The turbulent dissipation along with temperaure and salinity was measured on board R / V Dong Fang Hong 2 over the shelf break of the East China Sea from March 7 to 9, 2004. Applying the Turner angle, it is found that the ’diffusive ’double diffusion, salt-fingering, and stable stratification coexist in the upper water column of about 50 m. Below that depth, there exists weak salt-fingering. The turbulent dissipation rates are enhanced along the ray paths of M2 internal tides emanating from the The shelf break with values ​​ranging from 1.0 × 10 9 W · kg -1 to 1.2 × 10 -6 W · kg -1 The corresponding diapycnal mixing rates are from 1 × 10 -6 m 2 · s -1 to 1 × 10 -1 2 m2 · s · 1. The spatially averaged mixing rate over the whole observation section is 2.3 × 10 -3 m 2 · s -1, which is much larger than 1 × 10 -5 m 2 · s -1 of the background diapy-cnal mixing rate in the open ocean.