Abstract: Some problems about the transportation process of long distance oil pipeline under the low throughput have been discussed in the paper. These problems discussed include the hydraulic calculation of pipeline, paraffin removing period and the method of paraffin removal, thermal conditions of transportation under the condition of modification as well as the determination of economical volume of pour point depressant injected. The paper recommended simple equations which considered wax precipitation and latent heat, and the value of equivalent diameter and the total heat transfer coefficient.