The method includes following steps. Based on result of measuring quality in up link, network end adjusts maximum and minimum of soft switching threshold. Then, the network end sends the adjusted maximum and minimum to user equipment. Based on result of measuring quality in down link and received adjusted maximum and minimum by the network end, the user equipment determines current soft switchingthreshold. Further, the user equipment reports the measuring report to network end. Based on the measuring report, the network end adds or deletes links into active set of soft switching of users' equipment. The invention saves on network resources and satisfies quality of users' services and raises communication system capacity.