TRAILER HITCH COUPLER

Disclosed is a trailer hitch coupler, which solves a defect in the prior art that a hitch easily sways at a folded or unfolded position. The trailer hitch coupler as disclosed includes: a body secured to a vehicle body and a hitch, wherein the body comprises a main shaft and a fixed sleeve fixed relative to the vehicle body, the fixed sleeve being arranged to sleeve outside the main shaft, one end of the main shaft extending out of the fixed sleeve so as to be connected and synchronously rotate with the hitch; wherein the main shaft rotates to shift the hitch between a folded position and a unfolded position; one of the main shaft and the fixed sleeve is provided with a positioning groove, and the other one of the main shaft and the fixed sleeve is provided with a resilient assembly, such that when the hitch is disposed at the folded or unfolded position, the resilient assembly is inserted in the positioning groove so as to circumferentially position the main shaft.