Microgrid　with　hydrogen　storage　is　an　effective　way　to　integrate　renewable　energy　and　reduce　carbon　emissions.　This　paper　proposes　an　optimal　operation　method　for　a　microgrid　with　hydrogen　storage.　The　electrolyzer　efficiency　characteristic　model　is　established　based　on　the　linear　interpolation　method.　The　optimal　operation　model　of　microgrid　is　incorporated　with　the　electrolyzer　efficiency　characteristic　model.　The　sequential　decision-making　problem　of　the　optimal　operation　of　microgrid　is　solved　by　a　deep　deterministic　policy　gradient　algorithm.　Simulation　results　show　that　the　proposed　method　can　reduce　about　5%　of　the　operation　cost　of　the　microgrid　compared　with　traditional　algorithms　and　has　a　certain　generalization　capability.