The　effect　of　different　oxygen　annealing　treatments　on　the　structural　and　electrical　properties　of　samples　of　the　high　temperature　superconductor　YBa2Cu3O7-delta　(YBCO)　synthesized　by　a　biomimetic　method　has　been　studied.　By　oxygen　annealing,　the　oxygen　deficiency　resulting　from　the　synthesis　in　air　can　be　adequately　compensated.　A　two-stage　annealing　process　including　a　high　temperature　step　results　in　a　sharper　superconducting　transition　and　higher　critical　current　density　of　the　YBCO　than　annealing　only　at　low　temperature,　due　to　the　additional　elimination　of　carbon　residues　from　the　biopolymer　additive.　To　avoid　the　formation　of　impurity　phases　resulting　from　decomposition　of　the　YBCO　during　the　high-temperature　anneal,　careful　pre-treatment　by　rinsing　the　as-synthesized　YBCO　with　distilled　water　to　remove　residual　NaCl　is　necessary.