Electrolyte for lead storage battery and preparation method of lead storage battery

The invention discloses an electrolyte for a lead storage battery and a preparation method of the lead storage battery, and relates to the technical field of storage batteries. The composite additive electrolyte provided by the invention can inhibit grid corrosion and battery self-discharge of a battery pole plate caused by a cyclic electrochemical action reaction, and improves the cycle life performance of the battery; in a battery formation charging process stage, an acid extraction and acid re-supplementing method is carried out, the acid extraction function is to extract different sulfuric acid density electrolyte of formation reaction in each battery, and then a composite additive solution with the same density is supplemented; the density consistency of battery electrolyte is improved, the electrochemical reaction uniformity of new electrolyte and active substances is improved, and the density layering defect of sulfuric acid is reduced; and a battery acid absorption saturation amount method is adopted,