The utility model discloses a multi-hop voice transmission method which is used for widening Bluetooth application range based on Bluetooth technology, which belongs to regional wireless interconnected communication technical field. Based on open source Bluetooth protocol stack BlueZ, the utility model puts forward an implementation scheme of distribution type and loop-free route Bluetooth multi-hop link which is driven according to requirements and carries IP; the utility model designs a distribution type path discovery algorithm which suits for realization between the Bluetooth logic link control and an adaptation layer; at the same time, a method of realizing bidirectional voice communication on the Bluetooth multi-hop link is put forward by combining voice processing and transmission technology. The utility model greatly increases Bluetooth communication distance and can solve the problem of communication barrier through increasing a Bluetooth communication node; at the same time,the utility model increases link numbers of Bluetooth carry voice, each Bluetooth can support seven activated IP voice links at most and also can make voice multi cast and broadcasting; additionally,the Bluetooth multi-hop link can be fused with other IP network because of the ability of carrying IP.