Abstract: On the basis of the given thermal model in the shutdown process and the thermal and/or hydraulic models in the restart process, a simulation on the temperature drop process between pumping stations of Tieling-Qinhuangdao Oil Pipeline under the summer shutdown condition was carried out. Meanwhile, a restart process's simulation on Huludao-Suizhong's pipeline section at four operating conditions was also made. The paper analyzed and compared the restart process of the four processes, theoretically discussed the feasibility of oil transportation at temperature drop condition for the Tieling-Qinhuangdao Oil Pipeline.