The invention provides a 4G network voice data transmission method, comprising: when the base station sending the voice data to the core network, the base station constitutes multiple voice data packet to a large packet, and sends to the core network, the core network receives the large packet sent from the base station, and analyzes the large packet into small for processing; when the core network sending multiple voice data packets to the base station, the core network constitutes the multiple voice data packets to a large packet, and the base station receives the large packet sent from the core network and analyzes the large packet into small for processing. When sending the voice data, constituting multiple voice data packets to a large packet before sending, which can fully use the network transmission bandwidth, improves the voice data transmission rate of the base station and core network, thus to increase the terminal number of the base station to support simultaneous online voice call.