Sewer odor isolation device

The invention relates to the technical field of sewers, in particular to a sewer odor isolation device which comprises an upper boss used for being clamped at a water inlet of a sewer, a discharge pipe used for discharging waste water is arranged at the lower end of the upper boss, and a rotation part used for discharging water and isolating odor is arranged in the discharge pipe. According to the device, conversion of water drainage and odor isolation is achieved through the rotary part, two-stage filtration is arranged, hair can be hung and taken, a sewer can be effectively prevented from being blocked, the filtering device is convenient to clean, a buffer cavity is defined by a first filter screen, a second filter screen and a first conical table, and the filtering device is convenient to clean. And under the condition that the first filter screen and the second filter screen are blocked, the upper cover body can be jacked to remind a user to clean the device, the device is provided with a heat recovery de