The present disclosure provides a method of distributing flow on a 4G network, which is applied to a distribution device. The method includes: monitoring a GTPv2 signalling packet communicated between a mobile management entity (MME) and a serving gateway (SGW); obtaining a data plane tunnel identifier and a user phone number, which are carried in the monitored GTPv2 signalling packet and indicate a same user equipment (UE), and establishing association relationship between the data plane tunnel identifier and the user phone number; obtaining a target data plane tunnel identifier carried in a received data packet; and determining a target user phone number associated with the target data plane tunnel identifier based on the association relationship, and distributing the data packet based on the target user phone number.