The utility model discloses an use hot phonomotor of hydrogen as working medium, include that main cooler, heat sound pack (regenerator), heater and resonance forthright, the hydrogen alloy is stored up in the interpolation in heat sound packs stainless steel solid flat board, packs the high temperature warm area at heat sound, and metal hydride decomposes a hydrogen, system increased pressure, packing the low temperature warm area at heat sound, storing up hydrogen alloy and hydrogen emergence chemical combination, generate metal hydride, the system pressure reduces. The utility model discloses effectively increase the output pressure ratio of hot phonomotor, improved system efficiency. Furthermore, the utility model discloses a hydrogen is compared with the helium as working medium, and hydrogen has less hot depth of penetration, and it is less that heat sound packs the interval, has strengthened the thermal acoustic oscillation effect, significant to the efficiency that improves hot phonomotor.