Independent small disturbed missile model of traditional three channels (pitching, yawing and rolling) can't adapt to missile control in big attack angle and over loading, so the nonlinear block diagonal control was proposed to solve it. Firstly, the missile flight scheme of vertical turn was analyzed, considering the four layers of block diagonal model not to be affine. Secondly, the layered model was affinily processed, and a nonlinear block diagonal controller design based on missile turning trajectory in the way of reaction jet control was achieve. In the end, in veracious model and pneumatic parameter diversifying, some mathematic simulations were conducted, which show vertical turn can be achieved by the method with good robustness.