Abstract: A generalized Forcing KdV-Burgers equation including external source and friction dissipation is derived. The analysis shows that the external source with the dissipation would cause variation of mass and energy of solitary wave, and the dissipation would make mass and energy of solitary wave decreased exponentially with time. The numerical results show that the interaction of solitary wave with external source decreases the moving speed of solitary wave, and increases its amplitude. Without dissipation, solitary wave leaves the forcing region of external source quickly, and it is disadvantage for blocking formation, and however, with small dissipation, the interaction would cause solitary wave propagate in the form of oscillation around the forcing region of external source, which would greatly increase the interaction time, and maybe an important mechanism for the formation of regional blocking in the area of external source.