Abstract: In order to solve the problems of product quality and environmental protection of Petrochemical Plant in Zhongyuan Oilfield, it is planned to transport the mixed oil of imported Putuo oil and Zhongyuan crude oil in ZhongyuanLuoyang Oil Pipeline.The Zhongyuan crude oil has high pour point and viscosity and the physical properties of the piped oil will be changed after it is mixed with Putuo oil.Therefore, it is necessary to evaluate the feasibility of throughput increase and work out a new transportation scheme.Firstly, indoor mixing experiments were carried out to determine the mixing conditions of Zhongyuan crude oil and Putuo oil(mixing ratio 1:2.6)and measure the basic physical properties of the mixed oil at different mixing ratios.Then, four possible mixing transportation schemes of Zhongyuan-Luoyang Oil Pipeline were calculated, analyzed and compared with January as an example to determine the transportation scheme of each month.Finally, the deposition of heavy components during the shutdown of mixed oil was studied by means of the independentlymade settlement facility.It is shown that no obvious deposition of heavy components occurs in the experimental conditions.The research results provide the basis for assessing the shutdown risk of mixed oil and formulating the restart plan after shutdown.