Fine-grained components are the predominant composition in the research area in the northern Yellow Sea core sediment, amounting averagely to 87.03% of natural sediments, and directly affect the form, content and distribution of nitrogen in natural sediments, so that the vertical distribution of nitrogen in natural sediments is similar to that in fine sediments. The grain size of sediments has an important role in the early diagenesis of nitrogen. The finer the sediments are, the smaller the decomposition rate of organic nitrogen will be, i.e., organism was easily enriched in fine-grained sediments. The burial fluxes of various forms of nitrogen are different because of the varying sedimentation rates in different sampling stations. The higher the sedimentation rate is, the grater the burial flux of nitrogen will be. The burial fluxes of various forms of nitrogen are the highest in station C4 where the sedimentation rate is the highest.