A device for automatically dismantling a power battery module, comprising: a cutting platform; a clamping mechanism, configured to clamp two sides of a power battery module to move the power battery module on the cutting platform; a first cutting mechanism, disposed on the cutting platform, and comprising a first cutting blade, a cutting blade set, and a first drive assembly, wherein the cutting blade set and the first cutting blade are disposed vertically at an interval, the cutting blade set comprises a plurality of second cutting blades movable relative to each other and a second drive assembly configured to drive the second cutting blades to move and rotate, and the first drive assembly is configured to drive the first cutting blade and the second cutting blades to move vertically; wherein, the second drive assembly comprises a plurality of connecting frames hinged to each other, a plurality of bearings, a plurality of mounting bases, a first shaft, a first drive device, and a second drive device, the connecting frames comprise a plurality of connecting rods hinged to each other in the middle, each connecting rod is connected to a toggle stand, each bearing is mounted on the toggle stand, each mounting base is mounted on the bearing, each second cutting blade is mounted on the mounting base, the mounting base is provided with a through hole matching the first shaft in shape, the first shaft is slidably connected to the through hole, the second drive device drives the first shaft to rotate to enable the first shaft to drive the mounting bases to rotate, and the first drive device is connected to the connecting frames; a second cutting mechanism, disposed on the cutting platform, and comprising a third cutting blade, a fourth cutting blade, and a third drive assembly, wherein the fourth cutting blade and the third cutting blade are disposed vertically at an interval, and the third drive assembly is configured to drive the third cutting blade and the fourth cutting blade to move vertically; a turnover mechanism, disposed between the first cutting mechanism and the second cutting mechanism, and configured to horizontally turn over the power battery module; and a stripping mechanism, disposed at an outlet end of the cutting platform, and configured to strip a housing of the power battery module. a cutting platform; a clamping mechanism, configured to clamp two sides of a power battery module to move the power battery module on the cutting platform; a first cutting mechanism, disposed on the cutting platform, and comprising a first cutting blade, a cutting blade set, and a first drive assembly, wherein the cutting blade set and the first cutting blade are disposed vertically at an interval, the cutting blade set comprises a plurality of second cutting blades movable relative to each other and a second drive assembly configured to drive the second cutting blades to move and rotate, and the first drive assembly is configured to drive the first cutting blade and the second cutting blades to move vertically; wherein, the second drive assembly comprises a plurality of connecting frames hinged to each other, a plurality of bearings, a plurality of mounting bases, a first shaft, a first drive device, and a second drive device, the connecting frames comprise a plurality of connecting rods hinged to each other in the middle, each connecting rod is connected to a toggle stand, each bearing is mounted on the toggle stand, each mounting base is mounted on the bearing, each second cutting blade is mounted on the mounting base, the mounting base is provided with a through hole matching the first shaft in shape, the first shaft is slidably connected to the through hole, the second drive device drives the first shaft to rotate to enable the first shaft to drive the mounting bases to rotate, and the first drive device is connected to the connecting frames; a second cutting mechanism, disposed on the cutting platform, and comprising a third cutting blade, a fourth cutting blade, and a third drive assembly, wherein the fourth cutting blade and the third cutting blade are disposed vertically at an interval, and the third drive assembly is configured to drive the third cutting blade and the fourth cutting blade to move vertically; a turnover mechanism, disposed between the first cutting mechanism and the second cutting mechanism, and configured to horizontally turn over the power battery module; and a stripping mechanism, disposed at an outlet end of the cutting platform, and configured to strip a housing of the power battery module.