Fault positioning method and device

The invention provides a fault positioning method and device, relates to the technical field of network management, and is used for quickly and effectively positioning faults in a three-layer architecture of a 5G core network. The method comprises the following steps: collecting interactive signaling among network elements in a service process; when the service process fails, network elements related to the fault are determined according to the interactive signaling among the network elements in the service process; obtaining operation data of the network element related to the fault, wherein the operation data of the network element related to the fault comprises performance index data of a container interface, performance index data of a virtual machine interface and performance index data of a host machine interface; judging whether abnormal performance index data exists in the operation data of the network element related to the fault or not; and when abnormal performance index data exists in the operatio