The utility model relates to the technical field of vertical shaft construction. The segmental lining ring is suitable for the vertical shaft. The duct piece comprises five A-type duct pieces and fiveB-type duct pieces, the A-type duct piece and the B-type duct piece are both arc-shaped wedge-shaped blocks. The A-type duct piece and the B-type duct piece are symmetrical in structure; the longitudinal section of the A-shaped duct piece is trapezoidal; the longitudinal section of the B-shaped duct piece is inverted trapezoidal; the five A-type segments and the five B-type segments are arrangedin a penetrating and inserting mode to be spliced to form a complete segment lining ring, the adjacent A-type segments and B-type segments are connected and fixed through the transversely and obliquely arranged bolts, the segments are embedded more tightly, the overall rigidity is improved, the splicing speed is high, the construction speed is guaranteed, and meanwhile the structural stress is optimized.