The invention discloses a building masonry structure. The building masonry structure comprises a masonry structure body (1), wherein the masonry structure body (1) is overall in the shape of a cuboid, a boss (11) is arranged at one end of the masonry structure body (1), a groove (12) is formed in the end, opposite to the boss (11), of the masonry structure body (1), and the size of the groove (12) is matched with that of the boss (11); a lug (13) is arranged on the back face of the masonry structure body (1), and the lug (13) is provided with a through hole (14). Meanwhile, due to the fact that the connecting mode that the through hole is matched with a connecting body is adopted, even though the building masonry structure is used for a long time, the phenomenon that certain single blocks are disengaged from the constituted building shape edge due to uneven stress, so that the overall attractiveness of a building is affected can be avoided.