Embodiments of the present invention provide a soft handover method and device. The soft handover method includes: receiving a soft handover request sent by a home access node, where the soft handover request includes user plane information of the home access node and an identifier of an RNC; establishing a signaling connection mapping between the home access node and the RNC, and forwarding the soft handover request to the RNC; receiving a soft handover response returned by the RNC; establishing a user plane connection mapping between the home access node and the RNC, forwarding the soft handover response to an HNB based on forwarding user plane information, and forwarding user plane data. The technical solutions of the present invention implement a soft handover process between a macro cell and a home access node cell.