Aluminosilicate glass, preparation method thereof and cover plate glass

The invention provides aluminosilicate glass, a preparation method of the aluminosilicate glass and cover plate glass. The aluminosilicate glass is a group of glass compositions in an R2O-RO-Al2O3-SiO2 system. The 35kP temperature (T35kP) of the glass composition is not higher than 1230 DEG C, the 120kP temperature (T120kP) of the glass composition is not higher than 1155 DEG C, the (T35kP-TL) is greater than or equal to 90 DEG C, and the (T120kP-TL) is greater than or equal to 20 DEG C, so that the glass is not easy to generate a devitrification phenomenon in the industrialization process. The glass composition can be subjected to composite chemical strengthening, and when the strengthened glass is loaded on the outer layer of a display such as a mobile phone and the like to be subjected to a whole machine falling performance test, the glass is not broken after falling from a free falling body with the height of at least 150cm; the strength performance of the glass is superior to or at least equivalent to th