Subway tunnels often go deep underground, and the single excavation distance can reach several kilometers. The system composed of concrete conveying pipes and high-pressure concrete pumps can lay a continuous and stable "artery" from the mixing plant on the ground or at the entrance of the tunnel, pumping concrete (such as synchronous grouting slurry behind shield tunnel lining, tunnel secondary lining concrete, etc.) to the front-end working face several kilometers away. This avoids the difficulties, low efficiency, and safety hazards of traditional transportation vehicles scheduling in narrow tunnels, and is the lifeline to ensure continuous and rapid tunnel excavation.