Objective To investigate the effect of early rehabilitation treatment on functional improvement after total knee arthroplasty. Methods 48 patients (53knees) of rehabilitation in our hospital from 2010 to 2013 were divided into 2 groups, 22 patients (25knees) in control group were given common rehabilitation training, 26 patients (28 knees) in observation group were given early rehabilitation treatment. Results All the ROM, knee score and function score of 2 groups were improved, and observation group were better than that of control group (P<0.05),at the last follow-up, the PF, BP and VT of observation group were better than control group (P<0.05) . Conclusion Early rehabilitation treatment can significantly promote the knee function recovery after surgery and improve the life quality of patients, so it deserves to be generalized.