As an important part of interior design,soft outfit design directly affects the aesthetic feeling and living experience of the whole space.This paper aims to explore the aesthetic principles and practical methods of soft outfit collocation in interior design.Firstly,the basic concept of soft outfit design and its important role in interior design are expounded.Secondly,from the aspects of color matching,material selection,spatial layout,decorative details,etc.,the aesthetic principles of soft outfit matching are systematically summarized.Finally,analyze the application of soft decoration design in different styles and their impact on the spatial atmosphere.Through comparative research,we have found that successful soft decoration design not only achieves visual harmony and unity,but also meets the psychological needs and lifestyle habits of residents,thereby improving the overall quality of life.