A proximal posterior tibial plateau locking compression plate is revealed. This locking compression plate mainly includes a fixing plate and a pressing head having at least one threaded fixing hole and bent forward from the fixing plate. At least one lateral threaded fixing hole is arranged along the two sides the fixing plate and a plurality of lower threaded fixing holes is disposed on the fixing plate, extending downward. The threaded fixing hole on the pressing head, each lateral threaded fixing hole and each lower threaded fixing hole are mounted with a threaded fastener. Thereby the fractured bone fragments on the rear side of the proximal tibia, including those avulsed by the posterior cruciate ligament, are reduced anatomically and fixated rigidly. This locking compression plate not only allows the surgical staff to treat the fractured bone conveniently but also enables the patient to regain their pre-injury activities smoothly.