The unique places in the renovation of the gym and some professional problems that need special attention will be of great significance to the long-term operation of the gym; Because the design and decoration of the gym are more professional, the requirements for water products and environment are higher. The most important thing to know in gym decoration design is to reasonably divide the functional areas of the gym, which are generally divided into necessary areas and extended functional areas. When decorating the necessary areas, we must test the fitness equipment area, which is generally separated from other equipment, including the grand gymnastics room, bikram yoga room and spinning room. The decoration style and color of the gym are not particularly important, and can be designed according to the positioning VI image system of the gym. This paper points out some unique features in the process of gymnasium reconstruction and some professional problems that need special attention, which will be of great significance to the long-term operation of gymnasium. The design and decoration of the extended functional area of the gym can not be ignored. General gymnasiums include Sanda venues, table tennis halls, badminton courts, tennis courts and squash courts. The expansion area also includes leisure and entertainment areas. There are generally game halls and computer game rooms, and the nutrition restaurant is also an important one, although it still expands the content of functional areas; But these are related to the customer's experience, which is also the focus of decoration design. When the gym is decorated, the space should be wide enough to give gymnasts a sense of emptiness, and the layout should try to avoid columns. The area density of equipment is also the focus of the design and decoration of the club. When designing and decorating, it is necessary to consider whether gymnasts of adjacent equipment will influence each other during exercise. Secondly, the best safety protection should be taken for the safety problems in the process of fitness, such as treadmills.