The invention provides a processing technique of a remanufactured connecting rod. The technique comprises the steps of correcting a reference surface, namely, finely grinding the end surface of the connecting rod through a surface grinding machine; pre-processing, namely, boring until the diameter of a large-head hole of the connecting rod reaches the preset size on the basis of the end surface of the connecting rod; repairing for remanufacturing, namely, repairing by nano electric brush plating until the diameter of the large-head end reaches the second preset size on the basis of the end surface of the connecting rod; washing, namely, washing to remove dirt on the surface of the connecting rod, and leveling the end surface of the connecting rod; replacing a copper sleeve, namely, pressing a new small-head hole copper sleeve through a pressure machine on the basis of the end surface of the connecting rod; chamfering, namely, chamfering to form a small-head hole round corner and a large-head hole round corner through a round corner forming knife; processing the small-head hole, namely, perform half fine boring and fine boring for the small-head hole copper sleeve hole until reaching the standard size shown in the specification on the basis of the end surface of the connecting rod; processing the large-head hole, namely, processing until the diameter of the large-head hole reaches the standard size phi on the basis of the end surface of the connecting rod and under the assistance of the small-head hole copper sleeve hole. With the adoption of the technique, the processing hours can be decreased, and the processing precision can be improved.