Two-stage exhaust silencing structure and rotary compressor

The utility model relates to a two-stage exhaust noise reduction structure which comprises an upper cylinder cover and an exhaust noise reduction cover, the upper cylinder cover is provided with an exhaust hole, an exhaust groove communicated with the exhaust hole is arranged in a cover body of the upper cylinder cover, an opening is formed in the top surface of the exhaust groove, a noise reduction plate covers the top surface of the exhaust groove, and the noise reduction plate is fixedly connected with the upper cylinder cover. A first-stage exhaust cavity is formed between the silencing plate and the exhaust groove, a vent hole is formed in the position, away from the exhaust hole, of the silencing plate, the exhaust silencing cover is installed on the top face of the silencing plate, a second-stage exhaust cavity is formed between the exhaust silencing cover and the silencing plate, the vent hole is communicated with the first-stage exhaust cavity and the second-stage exhaust cavity, and an air outlet ho