By the analytic method, the control of V-bar departure in rendezvous and docking under the field of view constraint was studied. The basic maneuver strategy of V-bar departure using radial impulse was described. This strategy fulfils the requirement of minimum plume impact on the target and trajectory safety. The analytic solution calculating the maximum field of view using radial impulse and calculating the permitted impulse using field of view was developed on the basis of CW equation while the solution with the formulas to calculate the time of the maximum field of view and the departure distance in the V-bar direction was also developed. Finally, the comparison between numerical and analytic method shows the method developed in this paper is correct.