Primary healthcare is the first line of defense for the containment of COVID-19 pandemic. Primary healthcare has been studied extensively by academic circles in various countries during the pandemic, but the focuses vary across these studies due to differences in primary healthcare systems in different countries.

To understand the advances, hotspots, trends and differences of primary care-related research at home and abroad during the COVID-19 epidemic, and to provide a reference for further research in this field.

Primary healthcare-related studies published during the COVID-19 pandemic (between January 1, 2020 and June 30, 2022) were searched in databases of CNKI and Web of Science Core Collection on July 5, 2022, and 282 from the former database and 1 755 from the latter were included. CiteSpace was used for visualization analysis to provide a graphic visualization of co-occurrence networks of authors, keywords and keywords clusters, to perform a timeline analysis, and to detect keywords with bursts.

The number of publications in China grew fast at the beginning of the pandemic, then the growth gradually decreased, and tended to level off at the late stage. In contrast, relevant research started later in foreign countries, but the number of relevant publications maintained high-speed growth as of the study time. The major author cooperation forms were inter-small teams cooperation and inter-individual cooperation, and no large-scale inter-team cooperation was found. The hotspots of domestic research focus on the systems, the exploration of mechanisms and management practices related to pandemic prevention and control, while international research focuses on changes in healthcare-seeking patterns and the satisfaction of patients' medical needs under the influence of the pandemic. Psychological problems related to the pandemic were concerned by both domestic and international research.

Domestic and foreign studies have similarities and different focuses. To continuous refine and diversify domestic research, it is suggested to learn international experience, pay attention to the construction of relevant research forces, improve the knowledge system in this field, and actively use information technology to improve the primary care system amid the pandemic.

新型冠状病毒感染（简称新冠感染）疫情防控期间，基层卫生是防控的"第一道防线"。各国学术界对新冠感染期间基层卫生工作进行了广泛的研究，但基层卫生制度不同导致研究侧重点有差异。

了解新冠感染背景下国内与国际上基层卫生相关研究的进展、热点、趋势及差异性，为该领域进一步研究提供参考。

于2022-07-05，检索新冠感染发生后中国知网（CNKI）与Web of science（WOS）核心数据库收录的基层卫生相关研究的文献，检索时间范围均限定为2020-01-01至2022-06-30，纳入CNKI文献282篇、WOS文献1 755篇。利用CiteSpace软件进行可视化分析，实现作者共现分析，关键词共现、聚类、时间线分析，关键词突现分析。

从文献时序分布上看国内相关研究文献量在疫情发生初期增速较快，后增速逐渐下降，趋于平缓；国际上研究起始稍滞后，但保持较高增速至今。作者合作以小团队与个人为主，无大规模跨团队合作。国内研究热点偏重疫情防控相关体制及机制探讨与管理实践，国际研究关注疫情影响下就医方式的转变、患者就医需求的满足。国内与国际上的研究均重点关注疫情影响下发生的心理问题。

新冠感染背景下国内与国际的基层卫生相关研究既有共通点也各有侧重，国内研究在不断细化、多样化的进程中可吸收国际经验，重视相关研究力量建设，健全该领域知识体系，积极利用信息化技术完善疫情下基层卫生的服务体系。