Abstract: Through recent years' test in labotatory and on site, the authors have been studying the conditions for optimum heat treatment of Zhong Yuan crude oil and its effect from such five aspects as heating degree, abrupt cooling degree, temperature recovery, cooling manner and cooling rate, on the basis of which the oil transportation technology of synthetical treatment of crude oil by adding wax dope is designed, followed by an analysis of the feasibility of putting it into effect on oil pipeline.