Based on the petroleum processing units of a certain domestic refinery,the authors studied the appropriate cases for processing of Tahe medium gravity crude.The influence of three crude processing cases,including the case for processing of crude slate blended with Tahe medium gravity crude,the case for separate processing and storing of individual crude oils,and the case for flash distillation of Tahe medium gravity crude coupled with separated processing of crude oils,on the products quality,stability of production operation and the overall techno-economic parameters was investigated.The study results have shown that the case for processing crude slate blended with Tahe medium gravity crude could lead to deterioration of the FCC products distribution,dramatic reduction of light distillates,significant surge of sulfur content in FCC naphtha,and increased specific consumption of FCC catalyst,indicating that this case was obviously not suited for processing the Tahe medium gravity crude.The case for separate processing and storing of individual crude oils,however,could increase the aggregate salable products ratio,but the frequent switchover of process streams could cause difficulty and hazards to the stabilization of refining operations,which could not be an ideal processing case.The case for flash distillation of Tahe medium gravity crude coupled with separate processing of crude oils featured the simplicity of process scheme,easiness for modification of process units, easy operation and a slight increase in the aggregate salable products ratio,making itself a suitable case for processing the Tahe medium gravity crude. Based on the petroleum processing units of a certain domestic refinery, the authors studied the appropriate cases for processing of Tahe medium gravity crude. The influence of three crude processing cases, including the case for processing of crude slate blended with Tahe medium gravity crude, the case for separate processing and storing of individual crude oils, and the case for flash distillation of Tahe medium gravity crude coupled with separated processing of crude oils, on the products quality, stability of production operation and the overall techno-economic parameters was investigated. study results have shown that the case for processing crude slate blended with tahe medium gravity crude could lead to deterioration of the FCC products distribution, dramatic reduction of light distillates, significant surge of sulfur content in FCC naphtha, and increased specific consumption of FCC catalyst, indicating that this case was obviously not suited for processing the Tahe medium gravity crude. The case for separate processing and storing of individual crude oils, however, could increase the aggregate salable products ratio, but the frequent switchover of process streams could cause difficulty and hazards to the stabilization of refining operations, which could not be an ideal processing case. The case for flash distillation of Tahe medium gravity crude coupled with separate processing of crude oils featured the simplicity of process scheme, easiness for modification of process units, easy operation and a slight increase in the aggregate salable products ratio, making itself a suitable case for processing the Tahe medium gravity crude.