Abstract: The cry for oil pipeline coating overhaul is increasingly running hight in China, but the technique of field hop application can not ensure reliable quality. An effective solution to this problem is to apply overhaul oriented anti-corrosion rolls which can improve the quality of field application. The rolls are made of fiber glass which is soaked in melten and modified petroleum asphalt, cooled and then rolled, The assembly line for the roll production consists of feed mechanism, soaking mechanism, coaling mechanism, rolling mechanism, heating and electric control units, etc. The keys to the design of assembly line are ①Drive system so designed to keep uniform feed speed of base tape; ②The speed of base tape so controlled to adjust soaking period; ③roll thickness so controlled to meet the requirements for design accuracy, rapid feed-in and roll cleaning; ④Soaking pit structure so designed to get optimal soaking quality; ⑤Cooling equipment so selected to adopt itself to different environments. The assembly line has a production capacity of 100 m²/h, and is capable of continuous operation. It is shown through commissioning and operation that the system is feasible design, and that the droducts are stable in performance, and are the ideal material for coating application and holiday repair.