Two paraffins as raw materials were selected to mix with MOLEX paraffin and used to make a industrial trial in UOP-HF process of linear alkyl benzene (LAB). Influence on LAB quality and process was tested. The result shows that the LAB product can meet national standard specification but process parameters changed by the method above at certain proportion. Further sulfonation industrial test shows that the alkyl benzene sulfonic acid can reach the requirements of national standard.