The utility model relates to a tunnel lining tube piece, on which protruded surfaces and strip grooves, which size is far less than the blind mortise and the tenon in current technology, are provided on the sectional surface, for buffering and limiting during assembling the tube pieces. The utility model has the advantages of increased constructing efficiency and reduced unstable factors influencing the engineering quality and that meet the limitation requirements during tube pieces assembling; simply the steel mould producing techniques so as to increase the steel mould manufacturing accuracy and increase the tube piece producing quality; bigger power transmitting area due to same locating surface of the tube pieces; and greatly improve the structure stressing situation so as to improve the ring forming quality of the tube pieces during construction.