Comparing the advantages and shortcomings of two wastewater treatment methods, aerobic process biological rotary method and trickling filter method, a new process, potential energy increasing oxygen ecological purification technology(PIEP), was designed by combining the advantages of the two wastewater treatment methods. PIEP was applied in the treatment of high concentration organic wastewater in Nanjing Lamei Food Factory. The results show that PIEP is simple in design and dosen’t need blast aeration. The effluent of wastewater flowing into the wastewater treatment system meet the required water quality standards, and the whole process is under automatic control management. PIEP has characteristics that the wastewater treatment effect is good and the operation expenses are lower.