The present disclosure provides example congestion measurement method and network node. One example method includes receiving a first delimitation packet by a first network node, where the first delimitation packet includes a first identifier indicating a time at which a second network node sends the first delimitation packet. Statistics associated with a congestion status of the first network node is collected based on the first delimitation packet and by using a first time interval as a length of a cycle, where the second network node sends two neighboring delimitation packets during the first time interval. A first-type statistics packet is sent to the second network node by using the first time interval as the length of the cycle, where the first-type statistics packet includes the first identifier, and the first-type statistics packet indicates the congestion status of the first network node in the first time interval.