Abstract: In the pipeline, the liquid elastic wave can emerge pressured shock wave to flowing liquid and cause shear action. According to this characteristics, the application system of liquid elastic wave has been designed to remove wax, control wax, depress pour point, reduce viscosity and remove plug in oil (sewage) pipeline system. Incorporating the shear transportation process with the pressure transportation process, this system can carry out continuous shear and pressure treatment for the whole pipeline system. It is considered that this method is an advanced physical treatment method, and is better than the conventional shear treatment methods.