Safety joint for sucker rod in oil field

The invention relates to a safety joint of an oil field sucker rod. The safety connector mainly solves the problem that an existing safety connector of the sucker rod cannot be separated easily during jam releasing. A double-acting sliding sleeve (6) is arranged outside the lower end of the upper connector (1), the upper connector (1) is connected with the double-acting sliding sleeve (6) through an axial rectangular protruding edge (62), the lower end of the upper connector (1) is connected with a shearing clamping spring (7) through a clamping groove (13), and the shearing clamping spring (7) is located at the lower end of the double-acting sliding sleeve (6). The outer portion of the double-acting sliding sleeve (6) is connected with a lower connector (5) through threads, and a radial torque shear pin (4) is arranged between the double-acting sliding sleeve (6) and the lower connector (5). The safety joint of the oil field sucker rod is not influenced by scaling and consolidation of a liquid medium in a we