Abstract: In this study,four physiological and biochemical indexes of Cinnamomum mphora leaves were tested and analyzed under different chill stress.The results showed that the conductivity exhibited a tendency of "S" type curve,the contents of free proline,soluble sugar and soluble protein revealed a tendency of decrease firstly and then increase along with the reduction of stress temperature.It was thus found that four indicators were related to the cold resistance of camphor.They were coordinated with each other in order to enhance the ability to resist stress.