Low-cycle fatigue testing machine for anchor chain connecting chain

The utility model relates to the technical field of fatigue testing machines, in particular to an anchor chain connecting chain low-cycle fatigue testing machine which comprises a machine base and a clamping assembly, stand columns are arranged on the left side and the right side of the top of the machine base, cross beams are arranged on the tops of the stand columns on the two sides, through holes are formed in the tops of the cross beams, and a detection piece needing to be stretched is clamped through clamping structures on the upper side and the lower side. A first motor rotates a rotating disc, a lifting rod moves up and down in a through hole through cooperation of a connecting rod, and therefore stretching detection is conducted on a detection piece needing to be stretched, the detection piece needing to be bent is placed in an operation groove, the two sides are placed between a front guide assembly and a rear guide assembly, a second motor rotates a fixing block, and a rolling wheel rotates with the