The invention relates to an installation structure used for installing a unit glass curtain wall. The installation structure comprises an embedded part, an adapting part, a connecting part and fastening parts, wherein the embedded part is embedded in a main structure, and installation grooves are formed in the portion, located on the surface of the main structure, of the embedded part; the adapting part is connected with the embedded part; the connecting part is connected with the adapting part, and a protruding ridge is formed at the end of the connecting part; and the fastening parts are arranged on the protruding ridge in a clamping mode and can move along the protruding ridge. An engagement portion is arranged at the end, located on the outer side of the protruding ridge, of each fastening part. Each fastening part further comprises an engagement part which is arranged at the installation end of the glass curtain wall and engaged with the corresponding engagement portion. Installation bolts can slide along the installation grooves as well as slide along strip-shaped installation holes, deviation caused by installation of concrete structures and joints can be eliminated, and thus the installation quality of the glass curtain wall is guaranteed; in addition, operation is easy, the installation efficiency is high, and the construction period is shortened; and furthermore, the fastening parts can move along the protruding ridge and be matched with glass curtain walls with different dimensions, and accordingly the adaptability is good.