The invention discloses a liquid distributor for a metal fuel battery. The liquid distributor comprises a shell and a plurality of partitioning plates, wherein a liquid inlet is formed in the side wall of the shell; a plurality of liquid outlets are formed in the top of the shell; multi-stage division runners are arranged inside the shell; the multi-stage division runners are sequentially connected in the axial direction of the liquid inlet; a first-stage division runner of the multi-stage division runners is communicated with the liquid inlet; the number of each stage of division runners in the multi-stage division runners is sequentially increased by 2n in the direction from the axial direction of the liquid inlet to a direction far away from the liquid inlet; n is a positive integer; the multi-stage division runners are symmetric relative to the axial direction of the liquid inlet; the plurality of partitioning plates are arranged inside the shell in an up and down partitioned manner to define an S-shaped runner; the inlet of the S-shaped runner is communicated with the last stage of division runners of the multi-stage division runners; the outlet of the S-shaped runner is communicated with the plurality of liquid outlets. By adopting the liquid distributor for the metal fuel battery, electrolyte can be uniformly divided into a plurality of parts, and thus the flow of the electrolyte at the plurality of liquid outlets is accordant.