The periodic controlled supersonic mixing layer was simulated using large eddy simulation(LES) method. Features of vortices in this flow field was revealed clearly, and the ray tracing method was employed to calculate wave front distortion of a beam passing through the controlled supersonic mixing layer. A correction method for wave front distortion was proposed based on the analysis of dynamical characteristic of vortices in the controlled flow field, and it was tested by a supersonic mixing layer periodic controlled with different frequencies. The results show that the presented correction method can reduce the amplitude of wave front distortion to 50 percent or more, and shape of the controlled vortex in mixing layer is the key factor dominating the correction effect.