With the increasing trend of diversified house types, modular design has been widely used in the furniture industry, becoming an important design method to adapt to diverse space needs. Modular furniture adopts a detachable and combinable structure design, which disassembles the furniture into multiple independent modules. Consumers can freely combine modules according to their own house type size, space layout and use needs, realizing flexible switching of functions and efficient use of space. This design concept focuses on flexibility and practicality, which can not only adapt to the space layout of large-sized houses, but also meet the storage and use needs of small-sized houses, avoiding space waste. In the design process, designers unify the specifications and interfaces of the modules to ensure that different modules can be smoothly combined, while balancing the appearance beauty and structural stability of the furniture. The material selection of modular furniture focuses on durability and environmental protection, and after multiple processes, it ensures that the modules are tightly spliced, not easy to deform, and suitable for long-term use. In addition, modular design also facilitates the transportation and installation of furniture, reduces losses during transportation, and facilitates later maintenance and upgrading. Consumers can add or replace modules according to needs, extending the service life of furniture. At present, modular design has been applied to a variety of furniture categories, and its flexible adaptation characteristics have been recognized by consumers, promoting the furniture industry to develop in a more flexible and targeted direction, meeting the diverse living needs of modern families.