In order to enable researchers to better understand the application status of fund projects in related fields and improve the quality of fund project documents， we introduced the application， review and funding of the projects of marine and polar sciences of the National Natural Science Foundation of China in 2021， summarized the completion of the projects by the end of 2020， especially for the articles with first annotation， and presented the important research progresses in the main disciplinary directions in 2020. The analysis found that： ①The number of project applications for General Program and Young Scientists Fund in 2021 is the highest in history； ②In recent years， the number of applicants for General Program， Young Scientists Fund and Fund for Less Developed Regions has continued to increase； ③ Since 2019， research in the field of supporting technology and development of marine science has gradually increased； ④ Original and cross-type projects are still very scarce.