The invention discloses a lead-acid storage battery repairing activating agent. The lead-acid storage battery repairing activating agent is prepared from the following raw materials: acetylene carbonblack, zinc sulfate, sodium sulfate, sulfuric acid solution, nanometer silver, paratoluenesulfonic acid sodium salt, methoxypolyethylene glycols, potassium citrate, monopotassium phosphate, fumaric acid, ferrocene, titanium dioxide, glycerin, water glass, pullulan, sodium carbonate, carboxymethyl chitosan, vitamin E and deionized water. The lead-acid storage battery repairing activating agent hasthe advantages of relatively short repairing time, high repairing efficiency, relatively excellent repairing effect on a sulfurized storage battery, capable of effectively solving the problem of capacity failure caused by sulfation of the lead-acid storage battery, high in battery performance after repairing, and capable of prolonging the service life of the battery.