Abstract: The products pipeline is always underground buried, the oil temperature is always the same with the surrounding temperature. It will produce wax deposit in winter when it is cold, there will be more unnormal contaminated produce when it is washed, resolved by followed oil. This paper establishes a wax deposition theoretical model for products pipeline, analyzes the relationship between wax deposition tendency and oil temperature, amount, time through wax deposition indoor experiment. The formula to calculate and analysis on the lab wax deposition tendency and different factors based on Sigmaplot software is established, which provides a theoretical base to actual operation of products pipeline.