In order to realize the ranging of bi-static radar, a method of adjusting the delay of a transmitter triggering pulse is brought forward. By using this method, the mono-static and bi-static signals coincide with each other, thus realizing the bi-static raging, and simultaneously accomplishing the display emendation of bi-static signals. The model of adjusting transmitter triggering pulse is given in this paper, and the simulation result displays the feasibility of this method.