The construction skills of Jiangnan gardens are a set of complete and strict classical garden construction skills formed by construction craftsmen in long-term practice, including ancient architectural woodwork, masonry, lacquer, rockery and other types of work. Jiangnan classical garden architecture has many typical characteristics. It is based on wooden frames as the main structural method. The load-bearing structure is separated from the enclosure structure. The weight of the building is supported by the wooden frame. The wall only serves to enclose and separate the space, which is convenient for adapting to different climatic conditions and has high seismic resistance. Secondly, it has a unique single-body shape. The plane form of the single building is mostly rectangular, square, hexagonal, octagonal, and circular. Due to the use of wooden frame structure, the treatment of the house body is very flexible. The roof form of the building is rich and colorful, including the basic forms of hip-and-gable roof, hip-and-gable roof, gable roof, and gable roof, and there are double-eaved roofs. Later, many forms such as hook-and-link roof, single-slope roof, cross-slope roof, cupola roof, arched roof, and dome roof appeared. Third, unlike the official buildings in the north, the layout of the buildings is varied and not limited to the central axis symmetry. They often follow the slope and have flexible layouts, creating a winding path and a small view of the big in a small area. The shape is light and flexible, with a larger roof slope and a higher angle and eaves than official buildings. In addition to architectural skills, Jiangnan gardens, on the basis of taking into account the integration of natural and cultural aesthetics, also use key skills such as layout, water management, stone stacking, buildings, flowers and trees, integrating color, fragrance and rhyme, and turning the garden into a "visitable, habitable, walkable and visible" living space. Jiangnan gardens are not only beautiful in form, but also full of verve, profound artistic conception, integrating various arts, and have extremely high aesthetic value; its construction skills "although made by man, it seems to be created by nature" general principle of gardening, but also concentrate on the ideological value and cultural value of the unity of man and nature in China.