A deodorant water film sprayer of a flush toilet is used in a closestool of the flush toilet for spraying a water film to separate the upper space from the lower space of the closestool; nozzles are fan-shaped; water spraying ports are formed in the front sides of the nozzles; the four fan-shaped nozzles, including a front nozzle, a left nozzle, a right nozzle and a back nozzle, form a circle in an encircling manner; every two nozzles are separated by a partition; a post cap is positioned in the middle of the four nozzles; the post cap is connected with the back part of each nozzle; the post cap is further connected with a water spraying pipe; the middle part of the post cap is hollow; a water flow enters the post cap from the water spraying pipe, then enters the nozzles, and is sprayed out from the water spraying ports; holes are formed in the middle parts of the upper plates of the nozzles, and are connected with water pressure regulators; the water pressure regulators are shortened during normal pressure and elongated under the action of a pressure, and can automatically regulate water pressure to reach a stable state during instantaneous fluctuation of the water pressure.