Automatic cleaned kitchen ventilator

The utility model relates to an automatic cleaned kitchen ventilator, which comprises an exhaust hood, a wind pipe and a blower. The exhaust hood is inverse L-shaped, the horizontal component of the inverse L-shaped is a upper baffle plate of exhaust hood and the vertical part a case, the frontal side is arranged an air inlet which is connected with a cyclone type oil-removal device inside the case, the cyclone type oil-removal device is arranged at least one filtration washing device which is connected with the blower case via the wind pipe, and inside the blower case is arranged the blower and discharge pipe. The frontal side and/or two sides of the baffle of the said exhaust hood are arranged a removable sash door or a removable curtain. The utility model can purify the absorbed fuel via a cyclone oil collection and electric pump spray-wash, etc, and exhaust via the blower, so the impeller of the blower can not be caked with the contaminated oil without any cleaning treatment, and the other parts are cleaned with no need of demounting.