China’s online advertising business witnessed a slow development due to COVID-19 in 2020. China’s online advertising platform pattern has basically shaped up，and the overall development presents intelligent situation. E-commerce advertising has built a new development pattern tendency，while search advertising has formed the trend of involution. Socialized and e-commercialized video advertising has developed towards ecological management. Meanwhile，problems and challenges like the COVID-19，anti-globalization and politicization and other factors have impacted and damaged the development opportunities of the globalization of China’s online advertising. The digital advertising system of China’s online platform is still in the overtaking stage in the global game. Security problems such as oligopoly，data exploitation，user privacy have become public events and social problems. Abnormal advertising traffic，abnormal click and network dark industry etc. have become vacious phenomena in this industry. Thus，the development and operation of China’s online advertising should fit the new development pattern，and forma strategic planning and innovation-driven situation. We need to promote the construction of the new pattern of China’s development with the network advertising and advertising system，and construct the discourse power of China’s network advertising. And Digital rules，content construction and intelligentization are used to deepen the China’s advertising communication and China’s digital layout. We need to deepen 5G mobile construction，innovate and develop China’s mobile advertising ecology，occupy the commanding heights of advertising development，strengthen the construction of interest symbiosis market and advertising partner with technical commonness，and form the resonance market of digital advertising in China.