The characteristics of information sources are important elements that impact public opinion
dissemination on social media. This paper combines the ABC Attitude Model and S-O-R Model to
explore the overall impact of the two core characteristics of social media public opinion information
sources, namely Information Source Credibility and Tie Strength between information sources and
receivers, on the attitude of the receivers, and the mediating mechanism of Perception of Information
Credibility and Emotion. The results show that: (1) the Tie Strength has a positive impact on Willingness
to Propagate Public Opinion; (2) the Trustworthiness, Expertise, Objectivity of information sources, and
Tie Strength, all positively affect the Perception of Information Credibility; (3) the Tie Strength positively
affects the Emotion of receivers; (4) Emotion plays a mediating role between Tie strength and Willingness
to Propagate Public Opinion. Finally, the implications of the research conclusion on the practice of public
opinion governance is discussed.