Objective To investigate the technical parameters of barium titanate thin films prepared on titanium substrate, and to lay research base for the enhancement of the bonding strength of titanium porcelain. Methods Using barium carbonate and butyl titanate as raw materials, the sol-gel method was applied to prepare barium titanate films on titanium substrates, and then the quality of films prepared under different concentrations of sol and different drying mechanisms was compared. Results Comparing the two conditions: 1 ) 180 ℃ drying, 380 ℃ heat treatment with a heating rate of 6 ℃ / min, and 2 ) drying at 120 ℃ , 300 ℃ heat treatment with a heating rate of 3 ℃ / min, the film prepared under the former condition showed large degree of cracking after annealing. Using 0 . 3 mol / L barium titanate sol, the film prepared under the latter condition was basically intact, without cracks, while when 0 . 35 mol / L barium titanate sol was used, the film prepared under the same conditions showed obvious cracking. Conclusion The optimal conditions for preparing high-quality films were: 0 . 3 mol / L barium titanate sol, dried at 120 ℃ , 300 ℃ heat treatment with a heating rate 3 ℃ / min.