近十年迎来了海砂勘查和海砂矿权公开出让的热潮，粤桂闽近岸一带出让海砂资源量约3.9×10⁸m³。然而，应用于海砂沉积物分类的方法众多，但尚未发现较成熟的分类方案，研讨出一套相对统一的海砂沉积物分类方法是一项亟需解决的技术问题。基于近年来海南岛周边海域海砂勘查实践，对比常用近浅海沉积物分类方法及其应用效果，本文提出一套相对适用的海砂沉积物分类方法。建议的海砂沉积物分类方案可用菱形图表示，划分了砾（G）、砂质砾（sG）、泥质砾（mG）、砾质砂（gS）、砾质泥（gM）、砂（S）、泥质砂（mS）、砂质泥（sM）、泥（M）9种沉积物类型。进一步也给出了细分方案，以达到和Folk分类方法高度耦合。建议的海砂沉积物分类方案兼具描述性和解释性，既简洁又重视砾、砂、粉砂、黏土每一粒级含量的意义，保证了野外操作性和室内进一步研究的可能。

Over the past decade, there has been a surge in marine sand exploration and the public transfer of marine sand mining rights. Approximately 390 million cubic meters of marine sand resources have been transferred in the coastal regions of Guangdong, Guangxi, and Fujian. However, the classification of marine sand sediments remains challenging due to the variety of methods in use and the lack of a mature, unified classification system. Addressing this urgent technical issue, a suitable classification method for marine sand sediments has been proposed based on exploration practices in the waters surrounding Hainan Island. By comparing different classification methods and their application effects, this proposed scheme is represented by a diamond diagram, categorizing nine sediment types: gravel (G), sandy gravel (sG), muddy gravel (mG), gravel sand (gS), gravel mud (gM), sand (S), muddy sand (mS), sandy mud (sM), and mud (M). Additionally, a subdivision scheme has been introduced to align closely with the Folk classification method. This classification scheme is both descriptive and explanatory, concise, and emphasizes the significance of each grain grade's content, including gravel, sand, silt, and clay. It ensures practicality for sediment classification of field operations and paves the way for further laboratory research.