Public safety is related to emergency management, supply chain management and medical health, and its data sharing platform is of great significance to provide people with comprehensive public safety services, especially in the context of the current epidemic. However, due to the privacy protection of sensitive data, the architecture design of data sharing platform on public security has been facing challenges. To solve this problem, this paper presents a new design of public security data sharing platform based on permissioned blockchain. Its core idea is to realize the coordination workflow and access control mechanism by using smart contracts. Also, the satisfiability of the platform’s security requirements is analyzed. The proposal of this scheme shows that relying on the verification mechanism of permissioned blockchain and the automatic execution of smart contracts, the correctness of process execution and the privacy requirements of data in the public safety information sharing platform can be met.