The utility model discloses an on - -spot communication tool based on mesh net, including casing and internal circuit (b), the internal circuit includes: zigbee radio frequency module, the antenna, the DSP module, the RS232 module, the AD module, the module is put to audio power amplifier fortune. The utility model discloses an on - -spot communication tool based on mesh net, through the setting of zigbee module and DSP module, just can be effectual wireless communication between the realization short distance, can also make the communication tool constitute a mesh net simultaneously, the problem that a plurality of communication tools influenced each other at the in -process that uses just so can not appear.