A battery box body structure with a waterway comprises a lower box body and a box cover, an accommodating groove for accommodating a battery is formed in the lower box body, and the box cover covers the lower box body to seal the accommodating groove; wherein a main water inlet path is arranged on one side wall of the lower box body, a main water outlet path is arranged on the other opposite sidewall of the lower box body, a plurality of branch water paths are arranged in the bottom of the lower box body, one end of each branch water path communicates with the main water inlet path, and the other end of each branch water path communicates with the main water outlet path. According to the battery box body structure, the waterway is directly arranged in the box body, a battery is directly arranged in the box body when the battery box structure is applied, an additional heat management performance structure does not need to be arranged, the complexity of a production link is greatly reduced, the problem of leakage of cooling liquid is not prone to occurring, and a battery pack finished product is safer and more reliable.