The invention relates to a production method for split-layer oil wax waterproof leather and belongs to the technical field of leather. The production method for the split-layer oil wax waterproof leather includes the following steps that a split-layer leather blank is taken, dried and then subjected to leather grinding, first time of milling, spraying, oil wax roll painting, roll finishing, secondary milling and feeling agent spraying, and then the split-layer oil wax waterproof leather is obtained. The split-layer oil wax waterproof leather prepared through the production method has good waterproof performance and wet rubbing resistance and meanwhile has relatively high tearing strength; in addition, the split-layer oil wax leather prepared through the production method is relatively high in oil wax sense and chromatic aberration sense, the antiquing effect of the leather is effectively improved, scratching resistance of the leather is good, and scratches can disappear by themselves once happening to the surface of a leather material; and the performance of the split-layer oil wax waterproof leather prepared through the production method can rival the performance of top layer oil wax leather.