Subway station prefabricated part assembling and positioning device and positioning structure

The utility model relates to the technical field of metro construction alignment positioning, in particular to a metro station prefabricated part splicing positioning device and a positioning structure.The metro station prefabricated part splicing positioning device comprises an upper clamping portion and a lower clamping portion which are integrally formed, the upper clamping portion and the lower clamping portion are each in a circular truncated cone shape, and the lower bottom faces of the upper clamping portion and the lower clamping portion are fixed in a butt joint mode; the outer diameters of the two parts are gradually reduced from the lower bottom surface to the upper bottom surface; and the upper bottom surface of the upper clamping part is also connected with a guide structure. The positioning device provided by the utility model is used for guiding and aligning the upper prefabricated part and the lower prefabricated part and assisting in improving the aligning efficiency and accuracy of the prefa