Aiming at the difficulties of traditional real phase screen method,which can only characterize turbulent disturbances but cannot comprehensively characterize the energy attenuation,turbulence disturbance and nonlinear thermal halo effect caused by strong lasers in the atmosphere,a simulation scheme of high power laser atmospheric transmission based on complex phase screen is proposed.The scheme solution uses the real and imaginary parts of the complex phase screen to characterize the attenuation,turbulence,and thermal halo effects respectively,in which visibility comprehensively describes the attenuation of atmospheric absorption and scattering(characterized by the imaginary part of the complex phase screen),and the density disturbance equation based on hydrodynamics describes the combined effect of turbulence and thermal halo(characterized by the real part of the complex phase screen).This solution has the advantages of full-field tracking of the optical field and easy parameter control,and can provide a more perfect theoretical basis for the evaluation of the transmission characteristics of the far-field intensity laser.The simulation results show that the scheme is more consistent with the actual field measurement parameters and has the feasibility of semi-physical simulation and parameter evaluation.