Abstract: Take the Zhongyuan Oilfield—Ji'nan gas transmission pipeline project as an example, the analysis and discussion on the principle and standards to be abided by and the problems to be focused on in the design and calculation for the natural gas transmission with a crude oil pipeline are carried out in the paper. The transform steps for the project are introduced. Some problems on the commissioning and operation for the pipeline are analyzed. The author considers that the experiences of the pipeline transform can be used to other oil pipelines to transmit natural gas for reference.