The invention discloses an oil washing box for a crank connecting rod bearing of an internal combustion engine. The oil washing box comprises a cleaning box, a feeding and cleaning unit and a linkagelifting driving mechanism, wherein a conveying mechanism used for conveying the connecting rod bearing is arranged on the inner side of the cleaning box in the length direction of the cleaning box, the feeding and cleaning unit is composed of a feeding unit and a cleaning unit, the feeding unit is erected at the opening position of the cleaning box, and the cleaning unit is movably arranged belowthe feeding unit in a lifting mode. According to the oil washing box for the crank connecting rod bearing of the internal combustion engine, by arranging the linkage lifting driving mechanism, the effect that the conveying mechanism on the inner side of the cleaning box moves to be matched with the linkage lifting driving mechanism to drive the cleaning unit to automatically ascend and descend ina reciprocating mode is achieved, and finally, the effect that the cleaning unit is automatically controlled to conduct alignment lifting cleaning by intermittently controlling the conveying mechanismis achieved, so that workers have no need watching and performing manual alignment, meanwhile, the situation that a complex sensor detection control system is needed for achieving the effects is avoided, control operation is convenient, and the cleaning efficiency is remarkably improved.