The utility model provides a detection apparatus for barium sulfate degree of subsiding for battery, includes clamp rack, the scale colour comparison tube, and last a plurality of micro -machines and the clamp combination of being equipped with of clamp rack, motor switch, the time -recorder is taken the photograph camera and is taken the photograph the camera display, the power master switch. Being equipped with the scale on the scale colour comparison tube and having the gag, the scale colour comparison tube is installed on clamp combination. The beneficial effects of the utility model are that: simple structure, convenient to use, it is accurate quick to detect.