Diyao Longquan celadon body was enhanced by introducing silica sol. Influence of silica sol addition on microstructure and mechanical properties was investigated. The results show that, the silica sol uniformly distributes on the surface of the raw material particles,generates high activity ultrafine silica during fire process, which reacts with alumina and formats Mullite to achieve body enhancement. With the increase of the amount of silica sol, bending strength and sintering shrinkage increased firstly and then decreased. When the silica sol addition is 2%, Diyao Longquan celadon body sample achieves maximum bending strength and shrinkage .