An H-shaped high-waterproof shield segment capable of being quickly fixed is disclosed. Adjacent segment units are spliced into an annular structure through connectors installed in connecting channels, and the adjacent annular structures are axially spliced into segment rings in a staggered mode through the connectors installed in the connecting channels. The H-shaped high-waterproof shield segment has the advantages of being reasonable in design, simple in structure and rapid in production, improving the strength, rigidity and stability of an underground engineering structure, controlling deformation of the segment structure, improving the waterproof capacity of the segment rings and the like, and can be popularized and applied to the field of subway shield construction.