Voice communication method and device

The invention relates to a voice communication method and device. The method includes the steps that after an LTE network is accessed, registering to an IMS network provided by the LTE network is achieved; when a voice calling request initiated by a user is received, a VOIP voice calling request based on a packet domain is initiated through the IMS network; after a called subscriber answers the call, VOIP voice communication is conducted based on the packet domain through the IMS network; whether a first voice switching instruction sent by a base station is received or not is judged; if the first voice switching instruction is received, the VOIP voice communication is switched to be the voice communication based on a circuit domain. According to the technical scheme, the problem that user voice communication is not continuous due to poor LTE network signals is effectively solved.