2018 was a crucial year for rule of law construction of mobile internet. On the one hand，data security and personal information protection centered on the Network Security Law were highly valued by legislation，justice and law enforcement agencies. Network security was one of the hot words of 2018. On the other hand，E-commerce Law and Amendments of the Anti-Unfair Competition Law rolled out. Regulations on micro-blogs，live broadcasts，online credit，and public opinion attribute safety assessment were published. The competent departments of various ministries and commissions have issued relevant legal documents，which have formed a relatively complete mobile internet legal supervision system. In addition to the relevant new legislations，the mobile internet law enforcement agencies have also carried out rule of law attempts，including the seizure of illegal accounts，anti-indulgence，and exploration of 5G standards，which will have an important impact on the development of China’s mobile internet in the future. At the same time，in 2018，data protection laws have been introduced and the impact of these laws on China will gradually emerge in the future.