Rectangular bathroom decoration design is different from other types of bathroom decoration, and there must be great changes in redesigned layout and color matching. This paper introduces the related knowledge of rectangular bathroom decoration in detail. Toilet is an important place in the family and a specific environment with dual functions of defecation and cleaning. Therefore, everyone should make rational use of every inch of space when decorating. How to decorate the rectangular bathroom? The pattern of rectangular bathroom is different from other bathrooms, so some details should be paid attention to when decorating. Let's tell you how to decorate a rectangular bathroom. First, the decoration color of rectangular bathroom is less, but the planning should also pay attention to coordination and regularity. The color selection of the "three big pieces" of bathroom must be consistent, and the overall design of rectangular bathroom space. Generally speaking, white sanitary ware looks beautiful and comfortable, and ivory yellow sanitary ware looks rich and elegant; Lake green bathroom is natural and warm; Rose red sanitary ware is full of romantic and subtle colors. In any case, only by taking the bathroom as the main color and echoing the colors of the walls and floors can the whole bathroom be coordinated and comfortable. Second, the rectangular bathroom decoration precautions 1, the floor material must be selected in the case of water will not slip. It is best to use non-slip floor tiles with raised patterns, which are not only waterproof, but also not too slippery even in the presence of water. 2, dry and wet must be partitioned, even if it is a small bathroom, a reasonable shower curtain can do it. 3. When decorating the top of the bathroom, attention should be paid to prevent water vapor, so it is best to use PVC gusset plate with good waterproof performance. This gusset plate can be installed on the keel and can also cover the pipeline. Third, the rectangular bathroom ceiling decoration Rectangular bathroom ceiling can choose a variety of materials according to the characteristics of rectangular bathrooms. For example, flat roofs can use PVC gusset plates, aluminum gusset plates, plastic aluminum plates and light steel keels. The artistic ceiling such as dome can be decorated with soft waterproof board, soft board, plastic aluminum board and various colored glass.