The invention discloses a module for pipeline decoration. The module is characterized in that the module comprises butt joint columns, arc-shaped boards A and arc-shaped boards B; T-shaped grooves are formed in the two opposite side edges of each butt joint column respectively, T-shaped bulges are arranged on the two opposite sides of each arc-shaped board A, a slot is formed in the lower portion of each arc-shaped board A, T-shaped bulges are arranged on the two opposite sides of each arc-shaped board B, a slot is formed in the lower portion of each arc-shaped board B, and a plugging board is arranged on the upper portion of each arc-shaped board B; the height of each arc-shaped board B does not include the size of the corresponding plugging board, the height of each arc-shaped board A is equal to that of each arc-shaped board B, and the height of each butt joint column is n times as many as that of each arc-shaped board A or arc-shaped board B; the four butt joint columns are distributed at intervals of 90 degrees in a circumferential mode, n-1 arc-shaped boards B are vertically inserted between every two butt joint columns from bottom, each arc-shaped board A is inserted into the uppermost portion between every two butt joint columns, and a cylindrical cavity with a sealed periphery is formed by combination of the four butt joint columns, the corresponding arc-shaped boards A and the corresponding arc-shaped boards B. According to the module, modular combination is adopted, mounting, dismounting and maintenance are convenient, and the module can be subjected to secondary use.