The invention belongs to the technical field of high molecular film sewage processing, and discloses a sewage processing device based on high molecular film cleaning. The sewage processing device based on high molecular film cleaning comprises a purifying device; the inner side of the upper part of the purifying device is connected with a supersonic wave device; a round rod is arranged in the purifying device; the external part of the round rod is connected with a high molecular film placing rack in rolling connection; the two ends of the round rod are connected with T shaped circular rings; motor gears are adopted to drive the T shaped circular rings to rotate, so that circular motion of the high molecular film placing rack is realized; a vertical gear is designed to mesh first ring gearteeth in motion, so that the high molecular film placing rack is provided with torsional force; the torsional force is adopted to drive the high molecular film placing rack to perform circular motionaround the round rod through a first rolling bearing arranged on the high molecular film placing rack; spiral motion of the high molecular film placing rack is capable of realizing uniform receiving of energy by supersonic wave cavity. The above structure is capable of solving problems in the prior art that wearing is easily caused in mechanical cleaning of high molecular film, grease on high molecular film is impossible to be removed, and cleaning is not complete.