The frameless curtain wall ,or all glass curtain wall is a kind of glass curtain wall with full transparency and full view. It uses the transparency of glass to pursue the circulation and integration of the space inside and outside the building, so that people can see through the glass. Clearly seeing the entire structural system of the glass makes the structural system change from a pure supporting role to its visibility, thus showing the artistic, layered and three-dimensional sense of architectural decoration. It has the characteristics of light weight, simple material selection, factory-oriented processing, quick construction, convenient maintenance and repair, and easy cleaning