The effects of diffraction,turbulence,beam jitter,light beam quality β on ther-mal blooming are studied in this paper and it places particular emphasis on studying theeffect of light beam quality β factor upon thermal blooming. Four relations betweensteady-state,loug time and short time pulse transient thermal blooming and β factor areobtained.They have very important reference value for the experiments on high energylaser propagation through atmosphere.