Network time delay fault positioning method and device, and network time delay fault detection equipment

The invention discloses a network time delay fault positioning method and device and network time delay fault detection equipment. The method comprises the steps that a user terminal sends a plurality of request messages to a target address, survival time values of the request messages are different, and the different survival time values are used for triggering different transmission nodes to respond to the request messages; response durations of a plurality of transmission nodes between the user terminal and the target address are obtained, and the response durations of the plurality of transmission nodes between the user terminal and the target address are determined by the durations of the plurality of transmission nodes responding to the corresponding request messages; determining the response duration of the plurality of transmission nodes between the user terminal and the target address as the network delay of the user terminal and the plurality of transmission nodes, and determining the network delay