The utility model provides a
toilet drainage deodorization
system which comprises a pedestal pan cover, a plurality of drainers, a drainage main
pipe and an exhaust main
pipe, water seals are arranged in the drainers, the pedestal pan cover comprises a
cushion ring, a cover plate and an air suction
assembly, the air suction
assembly comprises an exhauster, and a main air suction
pipe communicated with the interior of the pedestal pan is arranged on the exhauster. An air outlet of the exhauster is communicated with the main
exhaust pipe, each drainer is provided with a water supplementing pipe communicated with the water tank, the main air suction pipe is provided with an air-sensitive detection head, the
cushion ring is provided with a
pressure sensor, and one side, close to the
cushion ring, of the cover plate is provided with an
infrared sensor. When the device is used in a
toilet, the exhauster works to pump and drain
odor generated by a pedestal pan, a drainage pipe and a floor drain, and when water is flushed, the water
inlet valve in the water tank supplements water to the water seal in the drainer, so that the water seal in the drainer can be effectively prevented from losing water and being invalid due to
evaporation and siphoning; and water stored in the water seal can be prevented from being changed into a
hotbed for breeding mosquitoes and
bacteria for a long time.