The invention provides a user plane selection method and device, and relates to the field of the communication. A user plane path to which a user accesses can be selected based on application awareness. The method comprises the following steps: a control plane module CP receives a user plane reselection request message sent by an application function module AF; the CP determines a fact that the UEaccesses to a first user plane function module UPF according to the service information of the UE; the CP respectively sends a user plane reselection rule to the first UPF and the second UPF, whereinthe user plane reselection rule comprises a SSC mode; the second UPF is the currently accessed UPF of the UE; the CP sends a session disconnection indication message to the second UPF, wherein the indication message comprises the UE identifier; and a session connection indication message is sent to the first UPF, and the message comprises the UE identifier; and the CP sends the user reselection response message to the AF, and the message comprises the identifier of the first UPF.