Abstract: Based on the different expressions of waxy oil specific heat for three continual temperature ranges, a formula to calculate the temperature along the hot waxy oil pipeline is derived from the balance of energy. After the results from the formula are compared with those from Sukhov formula, it is pointed out that: (1) the distance between the heating stations can be extended longer or quantity of heat to heating waxy oil can be less supplied; (2) the allowable minimum flow of the pipeline can be calculated to the less rate; (3) the general coefficient of heat transfer along the pipeline can be more exactly computed.