The invention discloses a preparation method for battery negative electrode material calcium zincate, which comprises the following steps: adding ZnO and Ca (OH) 2 in a seal chamber with NaOH solutionaccording to the molar ratio of 2:1; switching on a blower; continuously stirring reactant at 55 to 95 DEG C for 10 to 16 hours; directly pumping the products after reaction for filtration, washing the products after pumping filtration using anhydrous alcohol, then performing the pumping filtration again, and drying the calcium zincate after the second pumping filtration in a vacuum drying box at20 to 100 DEG C for 2 to 10 hours; recovering the filtrate of the first pumping filtration as the reaction medium for recycle utilization, recovering the anhydrous alcohol in filtrate of the second pumping filtration for recycle utilization after fractionation. The preparation method of the battery negative electrode material calcium zincate has the advantages of recyclability of mother liquor and alkali liquor, applicability to industrial mass production, low cost, environmental friendliness, and ability to effectively prevent acidization of products during the preparation of calcium zincatedue to a sealing device.