Poor toughness and high synthesis pressure of binderless cBN limits its application in the field of cutting tool. To enhance its toughness, an advanced layered BN toughened cBN (Lt-cBN) bulk was developed under industrial pressure. Then, the cutting performance and wear resistance of Lt-cBN was analyzed based on the unique microstructure during tungsten carbide cutting. It is found that the Lt-cBN reaches a high fracture toughness of 8.5 MPa·m^1/2, and is capable of realizing ultra-precision cutting of tungsten carbide with smooth surface of roughness lower than R_a 10 nm. The layered BN at the intersection of cBN grains within Lt-cBN contributes to the enhanced toughness, which further slows down the transformation of amorphization as well as the wear rate of the surface layer. Thus Lt-cBN exhibits better cutting performance and wear resistance in contrast to commercial binderless pure cBN material. The wear of Lt-cBN can be explained by the soft partially amorphous layer formed on the flank surface being rubbed and continuously removed in the form of abrasive wear.