The CVD installation to obtain coating on ceramic particles was designed and made. The process of obtaining TiN coating on Al
2O
3 particles was investigated. The results show that the TiN coating can improve the infiltrating depth of the heat resistant steel liquid between Al
2O
3 particles, and the particles can be firmly sustained by the matrix. The fraction of Al
2O
3 particles in composite may be adjusted between 23%~57%.