Building curtain wall mounting and fixing support

The utility model relates to the technical field of building curtain wall installation, in particular to a building curtain wall installation fixing support which comprises a fixing frame, the fixing frame is formed by fixedly connecting four fixing strips in a lap joint mode through first fixing screws, a clamping block is arranged in the middle of the back face of each fixing strip, and the fixing frame is used for strengthening stability of a curtain wall. According to the utility model, the inner wall of the fixing frame is clamped and matched with the outer wall of the curtain wall, and the curtain wall is formed by clamping and matching the curtain wall split bodies, so that the curtain wall is convenient to mount and dismount; a mounting rack for supporting and fixing the whole curtain wall is arranged on the back of the fixing frame; fastening assemblies used for mounting the fixing frame are arranged in the middle of the periphery of the mounting frame, so that the curtain wall is convenient to mount