Abstract: In order to solve the "data island" problem of traditional civil aviation information sharing mode, this paper summarizes and analyzes the current situation and problems of civil aviation security information sharing. According to the actual demand of civil aviation security, the blockchain model of civil aviation security information sharing is constructed. This paper studies the organizational structure, logical structure, sharing process, application scenarios and difficulties, proposes the application scenario of civil aviation security information sharing blockchain fusion, and constructs a new model of civil aviation information sharing. The research results show that the information sharing model of civil aviation security based on blockchain can make up for the defects of the traditional civil aviation information sharing model, and provide a new idea for the application of blockchain technology in civil aviation security.

Key words: blockchain, civil aviation security, information sharing, inter-departmental coordination