Abstract: The flexural static tests were carried out for 11 rectangular Xinjiang poplar beams，and it was studied bending performance in the tension zone bonded carbon fiber cloth reinforced timber beam，at the same time，their basic mechanical properties，such as water content，tensile strength，compressive strength parallel to grain and local transverse compressive strength were measured． It was verified the plane section assumption and got the relations among failure characteristics of load，ultimate load and load-strain． Test results show that bonding carbon fiber cloth in the beam tension is an effective method to improve the flexural performance of Xinjiang poplar beams．