The invention discloses an optical recording medium having a transparent substrate 1, a first protective layer 2, a recording layer 3, a second protective layer 4 , a sulfidation prevention layer 5, and a reflective layer 6, wherein the recording layer 3 comprises Ga, Sb, Sn and Ge, and where the transfer linear velocity is 20 m/s to 30 m/s, wherein the wavelength of a recording and reproducing light is 650 nm to 665 nm and the recording linear velocity is 20 m/s to 28 m/s, the refractive index Nc and the extinction coefficient Kc in a crystalline state and the refractive index Na and the extinction coefficient Ka in an amorphous state in the recording layer respectively satisfy 2.0≤； Nc≤； 3.0, 4.0≤； Kc≤； 5.0, 4.0≤； Na≤； 5.0, and 2.5≤； Ka≤； 3.1, the sulfidation prevention layer 5 has a mixture of TiC and TiO.
