The invention discloses a lead-acid storage battery brass terminal cleaning device which comprises a Z-axis lifting mechanism and an oil pool. The Z-axis lifting mechanism comprises two lifting plates which are horizontally and oppositely arranged, a linear driving mechanism acts on each of the two lifting plates, the lifting plates are driven by the linear driving mechanisms to move in the vertical direction, a roller frame is installed between the two lifting plates, a hollowed-out area is formed in the middle of the roller frame, the roller frame is rotatably connected with a roller assembly, the roller assembly is horizontally arranged in the hollowed-out area, a rotating mechanism is installed at the side, corresponding to the roller assembly, of one of the two lifting plates, and the rotating mechanism is rotatably connected with the roller assembly. According to the automatic brass terminal cleaning device, scraps in a brass terminal are cleaned in a rolling washing manner, the cleaning steps can be simplified, the cleaning time can be effectively shortened, and cleaning is more thorough.