The process and key points of replacing activated carbon in the adsorption method oil vapor recovery system are introduced and analyzed.Start-ing from the process flow and adsorption mechanism of the oil vapor recovery system,combined with the actual replacement situation of activated carbon in the oil vapor recovery system of the oil depot,the key points in the selection,replacement,passiva-tion,and operation process are analyzed,which can provide a reference for replacing activated carbon in the oil vapor recovery system of the oil depot.