The invention discloses a smoking quitting device arranged in a false tooth. The smoking quitting device comprises a nicotine sensor arranged on the side face of the false tooth and used for detecting whether nicotine exists in an oral cavity of a human body, a container, a controller, a micro pump connected with the controller, and a power supply unit connected with the controller and used for powering the controller, the container, the controller, the micro pump and the power supply unit are arranged inside the false tooth, an inner cavity of the false tooth is filled with a sealant, the nicotine sensor is connected with an input end of the controller, an output end of the controller is connected with the micro pump, the inside of the container is filled with a bittering agent, an input port of the micro pump is connected with the container, and an output port of the micro pump is positioned on the surface of the false tooth. When existence of the nicotine is detected in saliva in the oral cavity, the micro pump is enabled to release a trace of the bittering agent into the oral cavity, and the oral cavity becomes incredibly bitter, so that under the pessimal stimulation, a smoker can feel extremely sick of smoke, and the objective of smoking quitting is achieved in short time. The smoking quitting device is simple in structure, safe and high in efficiency, and has good smoking quitting effect.