Abstract
Blockchain establishes reliable trust among parties that do not know each other and achieves credible data sharing and point-to-point value transmission in an epoch-making way. The requirement of the availability of block chain network becomes more and more important due to the dynamic and changeable characteristics of block chain P2P network. Therefore, for the characteristics of block chain P2P network system, this paper constructs a availability model based on Markov stochastic process theory, analyzes the steady-state availability and instantaneous availability of the model, and finally carries out experimental verification through simulation, hoping to provide beneficial inspiration and guidance for future research on block chain network.