This paper is based on the discussion of the law of the interaction between the optic-field and fluid-field.The physical model is used which is high-energy laser beam to cross through the two dimension super-sonic free shot flow. It is discussed that the disturbance of the fluid-field caused by the radiation heating and the changing of laser beam's intensity after the beam passing through the fluid field and propagating a long distance in the steel atmosphere. The results show that there's a distinctness infection of fluid-field to the optic-field.In studying the interaction of high-speed fluid-field with high-energy laser, the radiation heating will be ignored.