Fabricated building curtain wall mounting structure

The invention relates to the technical field of fabricated buildings, in particular to a fabricated building curtain wall mounting structure which comprises a stand column fixed to a wall, a first semi-ring column and a second semi-ring column are arranged in a stand column mounting concave base, and a shaft sleeve arranged on a shaft rod in a sleeving mode is arranged in the middle of the first semi-ring column; a first clamping column and a second clamping column are arranged on the two sides of the section of the inner side of the second semi-ring column respectively, a first clamping groove and a second clamping groove are correspondingly formed in the two sides of the first semi-ring column, a limiting groove is formed in the two sides of the inner wall of the first clamping groove respectively, elastic limiting pieces are obliquely arranged in the limiting grooves, a clamping edge groove is formed in the bottom face of the first clamping groove, and the triangular clamping edge is located in the clampin