Temperable three-silver-layer low-E glass and tempering process thereof

The invention provides a temperable three-silver-layer low-E glass and a tempering process thereof. The glass comprises a glass substrate and the following layers laminated on the glass substrate from top to bottom: a first dielectric film layer, a first barrier layer, a first silver layer, a second barrier layer, a second dielectric film layer, a third barrier layer, a second silver layer, a fourth barrier layer, a third dielectric film layer, a fifth barrier layer, a third silver layer, a sixth barrier layer and a fourth dielectric film layer. The glass film layers has good heat resistance at high temperature; the tempering process employs low-temperature long-time heating, thereby effectively preventing the film layers from damage by high temperature; and the tempered glass has same transmissivity, reflectivity and low radiance as untempered glass and has the characteristics of high strength and good mechanical properties unique to tempered glass.