Preparation method of superfine nano silver powder

The invention discloses a preparation method of superfine nano silver powder, which prepares the superfine nano silver powder under the condition of not using a dispersing agent and a wetting agent, ensures that the silver powder does not contain organic matters, can meet the use requirement of the silver powder with high carbon content requirement, and widens the use range of the silver powder. Meanwhile, the silver chloride is crushed to the nanometer size through a high-pressure water crushing method and then reacts with the reducing agent through a pipeline mixer, and due to the fact that each silver chloride nanoparticle is an independent crystal nucleus, silver ions do not exist in the solution, the situation that the silver ions grow on the generated crystal nucleus when the silver powder is generated through a common liquid-phase reduction method is avoided, and the silver powder is obtained. The nanometer size of the generated silver powder is ensured; and during drying, low-temperature vacuum drying