The invention relates to the technical field of biology, and discloses a device for disinfecting and drying microorganisms in hair of home pets. The device comprises a shell, a button is fixedly connected to the exterior of the shell, a first gear is fixedly connected into the shell, a connecting rod is movably connected to the exterior of the first gear, a second gear is movably connected to theexterior of the connecting rod, and a rotating shaft is fixedly connected to the exterior of the second gear. Under the interaction of the button, a first gear, the connecting rod, the second gear, the rotating shaft, a rotating plate, a sliding groove, a rolling plate, a water spraying plate, an electromagnetic pump, a protective cover, a fan, a heating wire, a partition plate, a tank body and atime delay assembly, a user can more conveniently nurse daily hygiene of the pets, and the cost is lower; the user who needs to work in daily life enjoys happiness brought by the pets and takes care of the pets, and more time is shortened and labor is saved; and meanwhile, the device can rapidly dry the hair of the pets, and the pets are prevented from catching a cold and getting sick.