Left tibial plateau fracture is serious because tibial plateau fracture is an intra-articular fracture, which means that the fracture line has affected the articular surface and will cause the articular surface to be uneven. If one side of the tibial plateau fracture is collapsed and both sides of the plateau are not equal, there will be knee inversion and knee valgus in the future, resulting in O-leg, K-leg, X-leg, etc. If the tibial plateau fracture is poorly repositioned or the joint surface is not completely flattened, traumatic arthritis will occur in the future, which means that pain in the knee joint or popping in the knee joint will occur when walking, moving, squatting or working in the future, and osteoarthritis will occur in the future. Therefore, a tibial plateau fracture is a serious fracture that requires good repositioning, anatomic alignment, and firm fixation. Early functional exercises should be performed to smooth the joint surface and make it as flat as possible.