The utility model relates to a special section mine method tunnel structure of circle varies from top to bottom. Receive the influence of building subway line and all ring edge borders, later stage subway line construction condition is harsh relatively, and special sectional mine method tunnel structure scheme is arisen at the historic moment. The utility model discloses a tunnel structure's section is the circular form that varies from top to bottom, semicircle under first is mediate, pass through through the straightway between the upper and lower semicircle, whole bilateral symmetry, upward semicircle curvature radius is lighter than semicircle curvature radius down, mainly acts on the construction through the bassoon canopy with the advance support who advances the formula stock certainly. The utility model discloses have the section arrange nimble, inside spatial regularization range big, the reliable advantage of supporting construction system, satisfies that the upper portion cross -section is little, the circular structural type of class of big this special requirement in lower part cross -section, can effectively avoid the conventional shape of a hoof or stalk circular arch mine method tunnel excavation profile phase to adverse effect great and that the atress performance is relatively poor relatively simultaneously, has extensive application space.