In 2018，hotspots were still frequently coming about and undulating in China’s mobile public opinion field. Mainstream voices effectively occupied the commanding height of the mobile public opinion field while self-media had developed to a new level of in-depth reporting and interpretation. Furthermore，mobile short video platforms became an important emerging public opinion field. The specific culture of groups with the characteristics of stratification penetrated into the public field and the new information platforms began to enter into the small towns and other rural areas. The empathy effect，convergent communication，emotional expression and other factors catalyzed the detonation of public opinion hotspots. The guidance and regulation of the mobile public opinion field achieved positive results promoting the development of the mobile public opinion field towards a more harmonious and orderly direction.