Aiming at the problems that the low SNR (signal to noise ratio) of the transceiver integrated laser velocimeter caused low sensitivity,a method of optical feedback noise suppression for transceiver integrated laser velocimeter was put forward. The specular reflection was reduced by adjusting the angle of emitting window;the stray light flux into the semiconductor laser was reduced by adding diaphragm;the relative position between retro-reflector and semiconductor laser was adjusted. By these ways,the influence of optical feedback noise on the signal was effectively reduced. The verification test shows that the SNR of the testing system is well improved through the suppression of optical feedback noise. In engineering practices,this method can extend the dynamic range of the system and enhance the recognition capability when the signal is weak.