A pot experiment was conducted to investigate the effects of dry powdered sludge of waste liquid from papermaking with ammonium sulfite method on enzyme activities of urease, phosphatase, invertase and polyphenoloxidase. Results showed that dry powdered sludge retarded the activities of urease, phosphatase, invertase and polyphenoloxidase in the treatments without greengrocery, and the retarded level was enhanced with the increase of input amounts of dry powdered sludge. In treatments of planting greengrocery, the activities of phosphatase, invertase and polyphenoloxidase were retarded and showed the same trend with the treatments without greengrocery except urease which showed a reverse trend.