The utility model discloses a radiating fin for civil heating. The radiating fin can be arranged on a standard conduit. The radiating fin is provided with a large quantity of radiating ribs to increase surface areas. One side of each radiating fin is provided with an arc-shaped face which is engaged with the outer diameter of the standard conduit. The arc-shaped face on the radiating fin is appressed to the outer diameter of the standard conduit by screws (rivets) or other methods; the radiating fin is surrounded at the outside of the standard conduit, which can obtain a radiating purpose. Pressure in a tube is bore by the conduit. The utility model has the advantages of convenience, safety, reliability, and beauty. When the radiating fin is installed on an upright main tube, compared with the existing heaters of different models, the utility model can omit the occupied areas of the heater and a branch tube connected with the heater, and raises the utilization ratio of building areas.