Connecting structure in fabricated building

A connecting structure in a fabricated building comprises two prefabricated concrete members, and a plurality of connecting blocks are pre-buried in at least two opposite end sides of the end faces of the butt joint ends of the two prefabricated concrete members in the length direction; the connecting plates are rectangular plates, two connecting through holes are formed in the middle of each connecting plate at intervals, and the connecting through holes are triangular; each connecting plate is correspondingly arranged on two connecting blocks on two prefabricated concrete members; each single-side fastening bolt assembly is composed of a screw, a nut and a limiting block arranged on the screw in a sleeving mode. The tail part of the screw rod is triangular; the limiting block is of a triangular prism structure and is the same as the triangular tail of the screw in size. A screw hole through which the screw penetrates is formed in the center of the limiting block; the screw rod is arranged in a connecting th