The invention discloses an alkalescence aluminum-power-battery anode corrosion inhibitor and a preparation method of an alkalescence electrolyte. The alkalescence aluminum-power-battery anode corrosion inhibitor comprises a white powder and PAA viscous liquid (polyacrylic acid). The components of the white powder are as follow: sodium stannate is 30 wt percent to 34 wt percent, indium hydroxide is 15 wt percent to 17 wt percent, calcium chloride is 25 wt percent to 28 wt ercent and sodium fluoride is 23 wt percent to 27 wt percent. The preparation method of the alkalescence electrolyte comprises the following steps: the white powder and the viscous liquid, according to the respective dosage 4.2g/L of NaOH electrolyte and 40ml/L of NaOH electrolyte, are mixed with NaOH to prepare the alkalescence electrolyte of required concentration, namely, the alkalescence electrolyte of the invention. The implementation of the invention can both control the problem that the corrosion speed of an alkalescence aluminum-power battery at work is rapid, but also ensure higher electrochemical activity of an aluminum anode.