The utility model discloses a board -like heat dissipation battery box of spiral for electric automobile, including bottom plate, caping, all around the curb plate and be located the bottom plate and the caping between the passageway that encloses by the wallboard, a coolant passageway is separated to one side of passageway, and the outside of this coolant passageway is equipped with the condensation chamber, the coolant entry has been seted up with the place that the caping contacted in the condensation chamber, and the bottom in this condensation chamber is equipped with coolant and exports, the utility model discloses a run through the passageway of caping and bottom plate and combine the coolant passageway, circulate in the battery box through coolant and cool down, under the effect in condensation chamber, guarantee that coolant under the uniform temperature, guarantees the cooling radiating efficiency.