A method for power battery automatic fine-quantity sorting, characterized by comprising: S1. crushing and leveling a material, and performing a magnetic sorting processing to sort out iron powder; S2. performing an electrostatic processing on the material after being subjected to the magnetic sorting processing to sort out positive electrode material powder; S3. performing a bounce processing on the material after being subjected to the electrostatic processing to sort out collector and graphite powder; and wherein, a sorting apparatus based on the method for power battery automatic fine-quantity sorting, along the direction of material transmission, is successively provided with: a magnetic sorting device, comprising a permanent magnet rolling wheel, an iron powder hopper is provided at the lower left of the permanent magnet rolling wheel; an electrostatic sorting device, located at the lower right of the permanent magnet rolling wheel, comprising a grounded roller electrode, a corona electrode and a static electrode successively provided at the upper right of the roller electrode, and a brush in contact with the roller electrode provided at the lower left; the corona electrode, the static electrode and the brush are located at 1, 2, 9 o'clock direction of the roller electrode respectively; a bouncing sorting device, located at the lower right of the roller electrode, comprising a drive wheel, a driven wheel and a conveyor belt, a deflecting wheel and a carrier rod being provided below the driven wheel, one end of the carrier rod being connected to the deflecting wheel to form an eccentric wheel mechanism, and the other end being connected to the driven wheel. S1. crushing and leveling a material, and performing a magnetic sorting processing to sort out iron powder; S2. performing an electrostatic processing on the material after being subjected to the magnetic sorting processing to sort out positive electrode material powder; S3. performing a bounce processing on the material after being subjected to the electrostatic processing to sort out collector and graphite powder; and wherein, a sorting apparatus based on the method for power battery automatic fine-quantity sorting, along the direction of material transmission, is successively provided with: a magnetic sorting device, comprising a permanent magnet rolling wheel, an iron powder hopper is provided at the lower left of the permanent magnet rolling wheel; an electrostatic sorting device, located at the lower right of the permanent magnet rolling wheel, comprising a grounded roller electrode, a corona electrode and a static electrode successively provided at the upper right of the roller electrode, and a brush in contact with the roller electrode provided at the lower left; the corona electrode, the static electrode and the brush are located at 1, 2, 9 o'clock direction of the roller electrode respectively; a bouncing sorting device, located at the lower right of the roller electrode, comprising a drive wheel, a driven wheel and a conveyor belt, a deflecting wheel and a carrier rod being provided below the driven wheel, one end of the carrier rod being connected to the deflecting wheel to form an eccentric wheel mechanism, and the other end being connected to the driven wheel. a magnetic sorting device, comprising a permanent magnet rolling wheel, an iron powder hopper is provided at the lower left of the permanent magnet rolling wheel; an electrostatic sorting device, located at the lower right of the permanent magnet rolling wheel, comprising a grounded roller electrode, a corona electrode and a static electrode successively provided at the upper right of the roller electrode, and a brush in contact with the roller electrode provided at the lower left; the corona electrode, the static electrode and the brush are located at 1, 2, 9 o'clock direction of the roller electrode respectively; a bouncing sorting device, located at the lower right of the roller electrode, comprising a drive wheel, a driven wheel and a conveyor belt, a deflecting wheel and a carrier rod being provided below the driven wheel, one end of the carrier rod being connected to the deflecting wheel to form an eccentric wheel mechanism, and the other end being connected to the driven wheel.