Silver coating removing agent and preparing method and application thereof

The invention provides a silver coating removing agent and a preparing method and application thereof. The silver coating removing agent comprises an inorganic base, an ammonia carboxylic acid stabilizer, nitric acid, a silver ion complexing agent and hydrogen peroxide, and the silver coating removing agent is used for removing a silver coating of a printed circuit board. According to the silver coating removing agent, pollution to the environment is small, the removing effect on the silver coating is good, the surface of the bottom-layer metal is not corroded, and solder resist ink is not attacked. The silver coating removing technology adopting the removing agent is stable in effect and easy to manage and control.