The invention relates to a raft plate basic high-precision overall pre-embedded large-diameter bolt group structure. The structure is characterized in that the structure comprises an upper-layer positioning plate, a lower-layer positioning plate, a bottom support seat, pre-embedded foundation bolts, connecting bolts, fine-adjustment bolts and leveling bolts; unit positioning steel plates are connected and assembled through node plates and the bolts to respectively form the upper- and lower-layer positioning plates, the pre-embedded foundation bolts are disposed between the upper- and lower-layer positioning plates, the pre-embedded foundation bolts and the upper-layer positioning plate are connected through the fine-adjustment bolts, the pre-embedded foundation bolts is in anchor connection with the lower-layer positioning plate; and the leveling bolts are disposed between the lower-layer positioning plate and the bottom support seat to perform connection, and the bottom support seat and a concrete cushion are connected through the pre-embedded bolts. The bolt group structure can perform three-dimensional dynamic adjustments on the pre-embedded bolts, ensures accuracy of center coordinates and scale heights of the bolts, achieves high-precision pre-embedment of a bolt group, and has a good economic technical benefit. The invention further provides a construction method for the raft plate basic high-precision overall pre-embedded large-diameter bolt group structure.