Rectangular member turning pin hole clamp with self-locking device

The utility model discloses a rectangular member turning pin hole clamp with a self-locking device. The rectangular member turning pin hole clamp is characterized by comprising an L-shaped hook I and an L-shaped hook II which are semi-closed in the outer periphery of a box type cylinder, a fixed hole I is formed in the L-shaped hook I, a fixed hole II is formed in the L-shaped hook II, the fixed hole I and the fixed hole II are movably fixed by a shackle, a pin hole I is formed in the lower right corner position of the fixed hole I of the L-shaped hook I, a pin hole II is formed in the lower right corner position of the fixed hole II of the L-shaped hook II, and the pin hole I and the pin hole II are matched in positions, and are locked by a pin shaft. The rectangular member turning pin hole clamp has the advantages of being suitable for various situations and flexible to apply, having the self-locking function and preventing the hook from being released in the turning process to cause the safety accident.