Position information transmission method and system in communication, trunking terminal and device

The invention discloses a position information transmission method and system in communication, a trunking terminal and a device. The method includes the steps operated by the trunking terminal and the steps operated by a device used for achieving position information transmission in the communication process. The steps operated by the trunking terminal include sending a voice calling request to the device used for achieving position information transmission in the communication process, receiving a channel allocation command used for allocating voice communication service channels, and detecting whether the function of supporting position information synchronous uploading in the voice communication process is started, and if the answer is yes, synchronously uploading current position information through the channels in the voice communication process. The steps operated by the device used for achieving position information transmission in the communication process include receiving the voice calling request