The invention relates to high voltage switchgear and a machinery characteristic monitoring device thereof; the machinery characteristic monitoring device comprises a central processor, a data transmission module and a sleep wake up trigger circuit module; the central processor refers to a long sleep module, and is provided with a signal input end used for receiving digital quantity detection signals of a stroke sensor, an undercurrent sensor and a high voltage switch position auxiliary switch arranged in the high voltage breaker operating mechanism box; the sleep wake up trigger circuit module is provided with a port used for receiving a detection signal of the stroke sensor, and the output end is connected with a wake up trigger end of the central processor, so the central processor can be awakened when the stroke sensor detects high voltage switch stroke information, thus solving the problems that an existing high voltage switch machinery characteristic monitoring system is complex in structure, large in energy consumption, and low in data transmission reliability.