Purpose/Significance To understand the current status and influencing factors of residents’ utilization and dissemination of online dietary health information in the Yangtze River Delta region, so as to provide theoretical references for strengthening education on online dietary health information, and eliminating misinformation related to online dietary health.Method/Process The purposive sampling method is used to investigate residents in the Yangtze River Delta region, and the data is analyzed by descriptive analysis, independent sample t-tests, and multiple linear regression analysis.Result/Conclusion The dissemination of online dietary health information presents interactive characteristics of interpersonal communication and online communication. WeChat and Sina Weibo are the main sources of dietary health information. In addition to information screening, information search, systematic information processing, demand degree, information sharing intention and information concern motivation have significant and positive effects on the public’s willingness to receive information.