The invention provides an optical glass having excellent precision molding performance and having a refractive index of 1.46-1.53 and an Abbe number of 77-84. The optical glass comprises the following components based on cations in the molar percentage: P5+: 10-35%, Al3+: 10-35%, Ba2+: 1-20%, Sr2+: 10-35%, Ca2+: 1-20%, Gd3+: 0-10%, and Na+: 0-10%; the ratio of Sr2+/(Gd3++Na+) being 1-30; anions comprising F− and O2−, wherein the ratio F−/P5+ of F− content relative to the total molar percentage of anions to P5+ content relative to the total molar percentage of cations is 2.5 or more. The invention by rationally adjusting the proportions of the components, the molding performance of the optical glass is improved, and the problem that glass is broken and forms fogs during the molding process is solved, thereby the yield in manufacturing optical elements is improved.