Due to the large-scale application and spread of mobile Internet and its deep integration with PC wired internet, the divide between the vulnerable groups and the general public in terms of hardware device ownership has been greatly reduced. This means the traditional digital divide has been effectively improved, but not means that the problems facing the vulnerable groups have been completely solved. Instead, they are currently caught in another kind of divide, which is the digital information divide. Most of the existing literature only pays attention to the phenomenon of digital divide, but lacks in-depth exploration of the digital information divide between vulnerable groups and the general public. Based on a South Korean survey report-the Survey of Digital Information Divide, this paper gives a detailed explanation of the concept of digital information divide, and analyses the digital information divide of the South Korean vulnerable groups mentioned in the report. Based on the current situation of the digital information divide between the vulnerable groups and the general public in South Korea, this paper puts forward the countermeasures to narrow the digital information divide.