In light of the upsurge of dress-matching sharing and design production of daily Hanfu on social platforms, the work aims to analyze and explore the nature and significance of the daily Hanfu phenomenon. Through literature and word frequency analysis, key materials of the interview were obtained to conduct open-end interviews with 30 Hanfu researchers, designers, Taobao merchants and consumers from different industries. Based on the grounded theory, three main component factors of daily Hanfu were extracted. Combined with Pierce's semiotics, a ternary symbolic interpretation model of Daily Hanfu was constructed with the interpretant as the leading factor. It is found that daily Hanfu contains three characteristics, namely "daily nature", "modern constructivism" and "cultural symbolism". And the work answers three key questions: connotation, practice mode, essence, reasons and significance of daily Hanfu and its phenomena, and provides theoretical support and practical inspiration for promoting modern daily design of Chinese traditional costumes.