The utility model discloses a fully-flameproof hydrogen purity analyzer, comprising a host. The host comprises a sensing unit and a processing, display and control unit, the sensing unit and the processing, display and control unit are arranged in a flameproof shell, and a sensing signal output end of the sensing unit is connected with a signal input end of the processing, display and control unit; wherein the host further comprises a first wireless communication module, and a handset communication signal input/output end of the processing, display and control unit is connected with a signal input/output end of the first wireless communication module. The fully-flameproof hydrogen purity analyzer further comprises a handset, the hand set comprises a second processor, a second wireless communication module and an operation input module, a signal output end of the operation input module is connected with a manipulation signal input end of the second processor, a host communication signal input/output end of the second processor is connected with the signal input/output end of the second wireless communication module; and the first wireless communication module and the second wireless communication module are in wireless communication match.