The crankshaft connecting rod structure comprises a machine body, a crankshaft and a connecting rod, the crankshaft comprises a crankshaft journal, a supporting journal and a fixed-distance journal, and a first copper sleeve, a second copper sleeve, a third copper sleeve and a fourth copper sleeve are arranged on the contact surfaces of the crankshaft journal, the connecting rod and the machine body correspondingly; the first copper sleeve, the second copper sleeve, the third copper sleeve and the fourth copper sleeve are provided with a first oil inlet, a second oil inlet, a third oil inlet and a fourth oil inlet respectively, the outer end face of the first copper sleeve and the outer end face of the second copper sleeve are sealed through sealing structures, and the lower end of the connecting rod is closed and provided with a first oil outlet. The inner end face of the third copper sleeve and the inner end face of the fourth copper sleeve are sealed through sealing structures, a second oil outlet is formed below the third copper sleeve, an axial fixing assembly is arranged at the position, on the right side of the crankshaft, of the fixed-distance journal in a sleeving mode, and a third oil outlet is formed below the axial fixing assembly. The structure provided by the invention has the characteristics of recyclable lubricating oil, good lubricating effect, sanitation, environmental protection and the like.