The utility model discloses a height -adjustable the precast box is contained structure, include: by horizontal roof with set up the precast box is contained box of constituteing at the vertical sidewall of horizontal roof both sides, and two set up the wedge subassembly that is used for adjusting vertical height in vertical side wall bottom respectively, the box culvert intersects and personallysubmits " n " shape or " mouth " shape, the side wall bottom is vertical wedge, the wedge subassembly includes the connecting piece, wedge and voussoir mounting, the connecting piece is fixed to be set up in vertical side wall bottom, the wedge passes through voussoir mounting and connecting piece fixed connection, the wedge sets up in shield tunnel segment lining cutting inboard top. The utilitymodel discloses a precast box is contained passes through to adjust vertical relative position of wedge subassembly and the vertical side wall of box, adjustment precast box is contained's height toaccurate interval of adjusting precast box is contained box top surface and road surface / rail surface with the accumulative error who eliminates or reduce the shield tunneling construction conduction, and then reduces tunnel internal diameter, saving investment, its simple structure, reasonable in design, application effect is good.