For the low recovery rate of waste lubricating oil and the problem of waste, the process of hydrogen regeneration will be the main technology in the future.Comparison of operational experience of KLEEN,KTI,HYLUBE,REVIVOIL,PROP and study of other researchers can draw the following conclusions: The breakthrough of the hydrogen regeneration of waste lubricating oil is the pretreatment process and hydrogenation catalyst, however, in view of the limitation of the structure and composition of catalysts, the key point of hydrogenation should be the pretreatment process. In addition, the efficient detection and screening technology can be used to classify the waste lubricating oil, thus raw material can be transported to suitable hydrogen regeneration process equipment, it will greatly promote the development of waste lubricating oil recycling industry.