The four-part split damping hinge combines an innovative four-part structure, integrating four common products - the hinge, door stopper, door pull, and positioning device - into a single hardware component. The product can freely switch between one-stage and two-stage closing force, and also has multiple functions such as door panel buffer closing, opening angle positioning, and automatic limit to prevent bumping. It retains the oil-free split structure to eliminate the problem of oil leakage, significantly simplifies the installation process of wooden doors, reduces the cost of purchasing scattered hardware components, and provides a highly integrated one-stop hinge solution for home decoration wooden doors and batch production of engineering doors.