Abstract: To investigate the remediation effect of different soil repair materials and assess the impacts of soil physicochemical properties on catalase activities under Cd stress, this research added different kinds and different concentrations of repair materials into three different levels of Cd contamination soil in Hunan. The relations between catalase activities and pH value, available N, available P, available K, available Cd were studied through correlation analysis, multiple linear regression and path analysis. The results showed that pH value, available K, available N and available P were the major factors which influenced catalase activity in lower pollution soil; available N and available P were the major factors which influenced catalase activity in middle pollution soil; pH value and available Cd were the major factors which influenced catalase activity in serious pollution soil. With the Cd concentration increased in the soil, the influence coefficient of available Cd on catalase activities showed a growing trend, however, the influence coefficient of available K, available N and available P on catalase activities showed a reducing trend. Compared with the simple correlation analysis and multiple linear regression, path analysis results objectively and comprehensively explained the relationshipbetween soil catalase activity and soil physicochemical properties. This research could provide the foundation for accessing the effects of soil properties on enzyme activity.