According to the strength of finger extension and flexion after injury. According to the query of Changzhou industrial injury specific standards are as follows:

1, the first-degree disability means that the finger extension strength is less than 50%, that is, the finger extension strength after injury is less than 50% of the normal finger; Or the buckling strength is less than 50%, that is, the buckling strength after injury is less than 50% of that of normal fingers.

2. Secondary disability means that the stretching strength of fingers is less than 30%, that is, the stretching strength of injured fingers is less than 30% of normal fingers; Or the buckling strength is less than 30%, that is, the buckling strength after injury is less than 30% of that of normal fingers.

3. Third-degree disability refers to the inability of fingers to flex after injury, that is, the stretching force of fingers after injury is less than 30% of that of normal fingers, or the flexion force is less than 30% of that of normal fingers.