A friction reducing agent for natural-gas transfer pipeline and its production are disclosed. The process is carried out by dissolving oleate amide by dimethyl benzene solvent, adding into castor, mixing, decompress distilling to remove dimethyl benzene solvent, adding into liquefied paraffin and mixing. It forms into smooth friction-reducing liquefied film layer of transfer pipeline internal wall in natural transfer pipeline and decreases friction resistance and transfer pressure drop, has less energy loss and increases gas output.