Abstract:In order to study the cold resistance of Machilus plants , the physiological indexes of four species of Machilus under natural low temperature stress were detected: chlorophyll, relative conductivity(REC), malondialdehyde (MDA) , superoxide dismutase (SOD), catalase (CAT),peroxidase (POD), free proline (Pro), and soluble protein (SP) . The subor- dination function method was used to comprehensively evaluate the cold resistance of the four species of Machilus . The re- sults were as follows : Machilus ichangnsis >M. pauhoi>M. rufipes>M. macrocarpa . The results of the comprehensive e- valuation of the ornamental properties of four species of Machilus by using the analytic hierarchy process (AHP) were as follows :M. ichangnsis >M. pauhoi>M. microcarpa >M. rufipes