Abstract: The fouling problem in heat medium exchanger in Zhongyuan-Luoyang Pipeline is investigated and its causes are analized. The main causes include high salt and impurity contents in crude oil, low flow rate under small throughput. The corrective measures proposed are ① to use a different type of heat exchanger, which, while capable of efficient heat exchange, can slow down fouling and meet the present small throughput and the future large throughput operation; ② to install longitudinal deflection plates with considerable expances, to greatly increase heat exchange efficiency and expand cleaning interval; ③ to install return pipes for better heat exchange efficiency and lower resistance to impurity movement, which requires additional pumping equipment and power expances. Number one proposal is recommanded for the pipeline system in question.