Provided is a method for promoting wound healing, which comprises: administering a haptoglobin subunit to a subject in need thereof. Also provided is a method for promoting wound healing, which comprises: administering a modified haptoglobin subunit to a subject in need thereof, the modified haptoglobin subunit comprising an amino acid sequence selected from one of SEQ ID NOs: 1-3.本發明提出一種血紅素結合蛋白次單元之蛋白質之醫藥的用途,特別係一種含有血紅素結合蛋白次單元之蛋白質用於製備促進傷口癒合之醫藥的用途。更可用於抗氧化及/或抗感染。