The work aims to improve the waste paper fiber performance by 2, 2, 6, 6-tetramethylpipelidine-1-oxyl- radical (TEMPO) /NaClO/NaBr mediated oxidation system. Waste paper pulp was selectively oxidized with 2, 2, 6, 6-tetramethylpipelidine-1-oxylradical TEMPO/NaClO/NaBr mediated oxidation system under alkaline conditions. Pulp with various amount of carboxylate groups was obtained. Fiber morphology analyzer and chemical analysis were applied to observe the fiber shape and analyze amount of carboxylate groups, respectively. Then, handsheets were prepared from oxidized pulp and unoxidized pulp. The effects of carboxylate content of oxidized pulp, the amount of oxidized pulp added and NaClO/NaBr reusable times for paper strength properties were discussed. Carboxylate groups content of waste paper pulp increased with the increase of NaClO dosage. Fiber length, width and coarseness reduced somewhat. Tensile strength and ring crush strength of paper prepared from oxidized waste paper pulp increased obviously. Paper strength decreased a little after TEMPO and NaBr recycled twice. In conclusion, TEMPO oxidation system can be used for waste paper pulp oxidation to improve the waste paper fiber performance. The cost of production can be reduced by a way of recycling NaClO and NaBr.