According to the relevant provisions of cloud security management in China, in the cloud environment, cloud service providers cannot access the data uploaded by customers without authorization. However, according to the requirements of the Cybersecurity Law, network operators should strengthen the management of information posted by users on the platform. How to view the boundary of cloud platform data protection and how to balance the relationship between cloud platform data protection and content review obligation have become hot issues of current concern. Starting from the relevant provisions of cloud security management and Article 47 of the Cybersecurity Law, this paper deeply analyzes the relationship between cloud platform data protection and content review obligation, and puts forward suggestions for cloud platform to correctly perform data protection obligations.