Wu Ta-hsin or Wu Daxin (1933–2005) was a Chinese t'ai chi ch'uan teacher who lived most of his life in Hong Kong. He was the great-grandson Wu-style t'ai chi ch'uan founder Wu Ch'uan-yu and the grandson of the well-known teacher Wu Chien-ch'uan. He directed the Wu family's lineage for four years from the Wu family headquarters in Hong Kong after the death of his cousin Wu Yen-hsia.