A glass ceramic coating used for the protection of Ti alloy from oxidation during heat treatment and working process has been successfully developed. The coating is an aqueous suspension consisted of boric aluminium silicate glass powder, organic stick agent and solvent of water. Protective mechanism and designed principle of coating has been discussed. Oxidation behavior of Ti alloy coated the glass ceramics coating during heating process has been analyzed by means of EDS and heat scale.The results show that titanium alloys can be protected well against oxidation by the glass ceramic coating during heat treatment process.