Building curtain wall mounting assembly

The utility model relates to the field of building curtain wall installation, in particular to a building curtain wall installation assembly which comprises an installation frame, moving grooves are formed in the upper end and the lower end in the installation frame, and installation mechanisms are installed in the moving grooves. A bearing plate is fixedly mounted on the inner wall of the mounting frame, and the bearing plate is in a cross shape; the mounting mechanism comprises two bidirectional lead screws, the two bidirectional lead screws are rotationally mounted in the moving grooves in the upper end and the lower end of the mounting frame respectively, the two ends of each bidirectional lead screw rotationally penetrate through the moving grooves, and rotating blocks are fixedly arranged on the outer walls of the two ends of each bidirectional lead screw; and a plurality of screw blocks are movably arranged in the moving groove. When the position of the mounting bolt is adjusted according to the positi