Abstract:The phytotoxicity of aluminium on rice seedlings was studied. Putting different concentrations of AlCl3 in culture solution and maintaining for 30 days were made as the treatments of A1 to rice seedlings. More than 1.0 ppm of A1 obviously inhibited the growth of both roots and shoots. The most of A1 was accumulated in roots and the minority of Al was transported to shoots. Aluminium inhibited the Hill reaction and photophosphorylation of chloroplasts as well as the respiration and oxidative phosphorylation of mitochondria in roots. Calcium was an antagonist to aluminium in effects on above functions of rice seedling.