Based on the relevant studies conducted over the past few decades, in this article, the research status of atmospheric precipitation chemistry in China's offshore and coastal zones was systematically summarized in terms of precipitation pH and conductivity, the abundance and sources of major chemical constituents, the fluxes of nutrient wet deposition, and their ecological and environmental effects. The future research trends were also projected. The results showed that the pH and conductivity of precipitation in China's offshore and coastal zones were generally high in the north and low in the south due to the neutralization effect of alkaline ions from sand/construction dust in the northern region and the smaller precipitation amount there. The main chemical components in precipitation in China's offshore and coastal areas were dominated by 、、Ca²⁺、Cl^-、. The type of acid rain was primarily a mixture of sulfuric and nitric acids. The wet deposition characteristic of common ions in precipitation varied slightly across China's four major offshore sea areas. Except for the Bohai Sea, wet deposition was the main form in other sea areas, and it generally showed a pattern of wet season being greater than dry season. The Yellow Sea area had the highest ion deposition flux. Short-term heavy rainfall could affect the marine environment. The different components and proportions of input nutrients from wet deposition could influence the structure of marine plankton communities to some extent. Under the combined influences of sea, land, and human activities, the atmospheric precipitation in China's offshore and coastal waters exhibited chemical characteristics distinct from those in inland areas, which could have complex and far-reaching impacts on the offshore ecological environment. Future research should focus on land-sea coordination. It should delve deeper into the intrinsic influences and feedback mechanisms between terrestrial atmospheric pollutant emissions, precipitation chemical components, atmospheric deposition, and offshore ecosystem evolution. This approach may better explore the relationship between human activities and marine ecosystem evolution from the perspective of atmospheric deposition.