The invention relates to a high-refractivity environment-friendly ruby glass and a preparation method thereof. The ruby glass mainly comprises the following components in percentage by mass: 40-55% of SiO2, 10-20% of BaO, 7-20% of TiO2, 3-9% of ZnO, 0-5% of ZrO2, 2-5% of K2O, 1-9% of B2O3, 1-3% of CaO, 0.8-2.5% of CdS used as a colorant, 0.6-1.8% of Se powder used as a colorant and 0.1-0.5% of C powder used as a reducer. The glass solves the problem of influence of coloration of TiO2 on the glass color by using a special technique instead of any decolorant. The BaO and K2O are introduced in the form of carbonates, and no oxidizing atmosphere is introduced. The refractivity of the ruby glass is up to 1.62-1.7. The ruby glass is free of lead, arsenium and other harmful substances, and is free of expensive rare-earth oxides for regulating the refractivity and gloss of glass, thereby greatly saving the cost.