In the field of equipment failure, a large number of Fault Tree Analysis(FTA) diagrams and Failure Mode, Effects and Criticality Analysis(FMECA) tables related to equipment failure have been precipitated, but they are not highly utilized for fault diagnosis. The Fault Knowledge Graph(FKG) is based on the Knowledge Graph(KG) in the field of faults, it can well analyze the relationship between various faults, achieve prediction, and promote development. Therefore, the FKG creation method based on FTA and FMECA is proposed for fault diagnosis. Due to the different types of data sources, we first define the data model of the FKG, adopt two different map creation methods, and then perform knowledge fusion to obtain the final FKG. A case is presented to demonstrate the effectiveness of our method.