In order to achieve best damage effect for air-to-ground guided weapons, both terminal impact angle and precision were constrained strictly. Firstly, derivation of the optimal guidance law with impact position and angle constrained based on linear quadratic performance index was conducted. Then, the trajectory scheme for imaging guidance air-to-ground missile was studied. A new time-to-go algorithm was put forward to satisfy the work condition of navigation without GPS and guidance law parameter changed by the gimbal angle of seeker. The simulation results show that the trajectory project is feasible.