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This utility model relates to the field of hydrogen energy storage cylinder technology, specifically a hydrogen energy storage cylinder with a pressure relief structure. It includes a cylinder body, a pressure relief assembly, and an energy recovery assembly. The energy recovery assembly includes a turbine tube, impeller blades, and a motor. A fixed shell is fixedly connected to the center of the turbine tube, and the lower surface of the fixed shell is fixedly connected to the motor. A drive shaft is rotatably connected inside the motor, passing through the fixed shell and extending to its upper surface. When the cylinder pressure is too high, the pressure relief assembly opens, allowing high-pressure hydrogen to enter the turbine tube, driving the impeller blades to rotate. The blades, through a pull rod and a fixed ring, drive the drive shaft to rotate, thus driving the motor to generate electricity and recover energy. Pulling the pull rod adjusts the blade angle, changing the hydrogen thrust effect and affecting the drive shaft speed and energy recovery efficiency. The pressure relief assembly can release excessive pressure in a timely manner, ensuring cylinder safety. Utilizing the pressure relief energy to generate electricity improves energy efficiency.