Class D dry powder extinguishing agent, which is independently developed by our company according to the property of metal burning, possesses self-owned intellectual property, filling in the domestic blank. Its fire extinguishing effectiveness has been tested in the marketplace for over years. The agent, characterized by good mobility, long storage life, high efficient fire fighting and high pertinence, can be charged in portable extinguisher, wheeled fire extinguisher and dry powder fire truck, applying to metal and light metal class D fire and metal organic compound like alkali metal and metal hydride.