The indoor extension of the wooden balcony model building is a place for residents to breathe fresh air, dry clothes, and place potted plants. Its design needs to take into account the principles of practicality and beauty. Balcony generally has three types: cantilever type, embedded type and corner type. Balcony can not only make residents receive light, absorb fresh air, do outdoor exercises, watch, cool, and dry clothes. If well arranged,