Biogenic components in total 29 surface sediments, which were taken from the northern Bering Sea during the First and Third Chinese National Arctic Expedition cruises, are analyzed for probing into the relationship between surface primary productivity, chlorophyll and nutrient conditions in this area. The results show that the highest TOC percentages appear on the outer-middle shelf, with the higher in the basin, and the lowest in the area from the inner shelf to the Bering Strait;the highest biogenic opal percentages appear in the basin and slope, with the higher on the outer-middle shelf, and the lowest in the area from the inner shelf to the Bering Strait.