Research on laser atmospheric transmission effect is always important in laser application. Numerical simulation is a common method to research on atmospheric turbulence effect. Based on power spectrum inversion method, numerical simulation of wave front phase screen by Kolmogonov atmospheric turbulence is implemented. Research results show that on the basis of the phase screen generated by power spectrum inversion method, the atmospheric turbulence effect can be better simulated by the low frequency part being compensated by sub-harmonic.