The iteration of the blockchain bottom architecture technology is the core impetus for the development of the blockchain industry. The domestic blockchain industry is still in the stage of researching the application，and the bottom architecture technology of the blockchain still has many bottlenecks that need to be solved. Once the breakthroughs are achieved，it will greatly contribute to applying ability of blockchain technology. This report reviews and analyzes the overall performance，security，cross-chain technology，data privacy，and encryption of the domestic blockchain bottom architecture technology，and horizontally compares the technology details of five domestic representative blockchain bottom architecture platforms to explore the trends and differences in the technical development route of the blockchain bottom architecture technology in China. In the meantime，this report also reviews the construction of the enterprise-level BaaS platform based on the domestic consortium blockchains，introduces its technical architecture，bottom layer compatibility，performance throughput，commercial application capabilities，etc.，which is highly significant to analyze the development path of the BaaS platform and enterprise application scenarios. Through the analyses，the domestic blockchain industry is gradually breaking through the bottlenecks，such as performance，security，and cross-chain interoperability after consortium blockchains becoming the main development direction and technology leadership has gradually formed. With solid accumulation in terms of blockchain patents in China，China will gradually master the autonomous and controllable core blockchain technology in the future and obtain an essential position in the formulation of international standards and market competition.