The utility model relates to an improved sprayer-structure specially used for a lower-pressure carbon-dioxide fire-extinguishing system, belonging to the technical field of fire fighting equipment. The sprayer comprises a sprayer with taper-hole; the big end of the taper-hole is an inlet and the small end of the taper-hole is an outlet. A distributing baffle is fixedly connected with the outlet end. When in spraying by the sprayer, the shot-flow of carbon-dioxide can be sprayed out from the outlet, and when the flow is blocked by the distributing baffle the flow is sprayed out from two sides. As the distributing channel formed by the distributing baffle is so wide that no clotted dry-ice trapping the outlet can be generated so as to guarantee the smooth spraying of the system.