This paper tries to extract the architectural decorative features of ancient theatre from the three levels of architectural form, architectural appearance and architectural structure. Combined with the historical status of the ancient theatre as well as its developmental lineage, the programmed and ceremonial nature of the theatre is taken as the main component influencing the decorative style of the ancient theatre. The decorative art of the ancient opera stage in the coastal area of East Zhejiang is comprehensively analysed in terms of motifs (construction decoration, carving decoration, painting decoration), graphics (tattoo symbols), and colours (traditional colours), respectively. Based on the development of opera in the Ming and Qing Dynasties, focusing on the Ming and Qing Dynasties, the structural changes of some of the opera stages in the coastal area of East Zhejiang during the Ming and Qing Dynasties are recorded and compiled. The craft techniques, application embodiment, humanistic connotations, and current problems of ancient stage decoration techniques are being analyzed. The modern development of the decorative art of ancient theatre is analyzed in relation to the interviewees’ concern for the decorative art of ancient theatre. The decorative art of ancient times was the overall expression of patterns, graphics, and colors. The ancient stage in the coastal area of East Zhejiang is decorated with five types of patterns: animal and bird patterns, human and god patterns, flower and grass patterns, geometric patterns, text patterns, as well as a combination of various patterns, and the colours are often embodied in the whole (monochrome) and part (coloured), showing the effect of the simplicity of the overall situation and the details.
