The invention discloses a method for processing PDCP (packet data convergence protocol) count values. The method includes determining initial values of the PDCP count values according to existing information of the PDCP count values; distributing the PDCP count values for data packets according to the initial values of the PDCP count values. The initial values of the PDCP count values are carried by migrated unacknowledged modes UM. The method has the advantages that sufficient safety protection can be provided for multiple connections by the aid of a technology for processing the PDCP count values, secret key exposure risks due to existing transmission mechanisms when business connections are migrated among a plurality of nodes can be prevented, and the safety can be guaranteed in migration procedures.