The innovative presentation and dissemination of traditional culture is a key focus of national cultural construction in the new era. As one of the representatives of traditional Chinese culture, the effective use of digital technology in the innovative presentation and dissemination of classical gardens in Jiangnan is significant. Classical gardens are an art that integrates time and space, pursuing the expression of landscape painting and artistic conception. Digital presentation is an innovative reinterpretation of its value, emphasizing perception and interactive experience. The study summarized the core values and carrier relevance of Jiangnan Classical Garden and conducted research and evaluation on 18 representative Jiangnan Classical Garden in Suzhou, Yangzhou, and Shanghai. It was found that the current presentation content mainly focuses on social culture, art, science, and technology, as well as traditional culture, thoughts, and emotions. However, the style and artistic conception of landscaped gardens, the artistic system and gardening techniques, and the land use and environmental views of residential construction are insufficient, and the content form and presentation dimensions are limited. The presentation channels mainly rely on manual explanations, presentation boards, and traditional digital media, with relatively few applications of new digital technologies; The presentation process lacks a deep integration with sightseeing methods, and there is room for improvement in novelty, diversity, interactivity, and other aspects. Based on the above research and analysis, suggestions for the digital presentation of Jiangnan Classical Garden are proposed based on clear presentation content, innovative presentation methods, and improved presentation experience. Research is important in promoting digital transformation, innovative protection, and inheriting China’s Classical Garden heritage.