After experiencing problems such as shutdown and limited offline activities caused by the COVID-19 pandemic, various industries have taken the initiative to take self-help measures such as Internetization, which makes the industry economy change significantly in the post-pandemic era and makes it necessary to re-evaluate the industry economic pattern. However, online public opinion is diverse and platform content is complex. Therefore, it is essential to observe economic activities from the network information platform and complete the screening and purification of information. In order to improve the degree of quantification, and deepen the understanding of data, this paper solves the above problems through parallel coordinate visualization. At the same time, the lines in the parallel axis are used to indicate the amount and specific trend of industry information, which not only reflects the role of parallel coordinate visualization methods in industry dynamic analysis and real-time display but also makes industry development forecasts more feasible.

The outbreak of Covid-19 in specific areas characterized with global industrial chain reconstruction, grasps the epidemic prevention and control, while the growth of economics is the key point of government management in the post-epidemic time scale. In the last two years, various industries were affected by the outbreak of the new champions league experience “determination to keep factories and workers idle - to return to work and production - not to return to work and production”, which significantly changes the industrial performances. Both industry change and the development of the pattern of economic evaluation are equally important. This study used media platform composite index and edge parallel coordinates visualization method of combining the bundle, selected in 2020 and 2021, 11 industry information volume in 7 platform, through the medium of agenda building industry change from comparative analysis of two developing and development situation. This paper indicated that the major factors influencing the change of media attention in the course of the epidemic were the degree of social risk and the basic needs of the public. The epidemic had a great impact on the development of all industries, and the continuous improvement of the industry’s ability to deal with major risks became the main trend of future development.

Nowadays, with advanced information technology, cloud computing, big data, and other technologies are widely used in various activities, and their value has been proven and attracted people’s attention. This article aims to study the challenges faced by the development of national information security in the context of big data in the new era. While the big data platform brings convenience to social life, it will also have a major impact on national information security. In order to protect information security, big data needs to be managed to improve the quality and efficiency of its use. As a result of empirical analysis, information security in this environment is a personal issue as well as an important social issue. The way to solve this problem naturally starts from increasing people’s awareness of preventing personal information and increasing the protection of commercial information, but it is necessary to improve relevant government laws and regulations, improve the government’s information supervision capabilities, and clean up and optimize for the government. The unique role of the information environment is more important and more fundamental. In 2018, a total of 3 billion pieces of data were leaked worldwide, an increase of 70% compared to 2017. Information leakage occurs almost all the time, so we should effectively prevent information from being stolen.

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