The invention discloses an air conditioning system and a rotating compressor component thereof, wherein the rotating compressor component comprises a liquid accumulator and a rotating compressor, the liquid accumulator is provided with an air outlet; the rotating compressor comprises a compressing mechanism which comprises a main bearing, an air cylinder component and a supplementary bearing, the air cylinder component comprises two air cylinders, a baffle plate and two slip sheets, each air cylinder is provided with a compression chamber, a first air entry and a slip sheet groove, and the compression chamber comprises an intake chamber and an exhaust chamber, the compressing mechanism is provided with a jet chamber, the exhaust chamber, of one of the two air cylinders, is connected with the jet chamber which is provided with a second air entry and an exhaust port, the second air entry is used for introducing a medium-pressure refrigerant and a high-pressure refrigerant, the first air entry, of one of the two air cylinders, is connected with the air outlet, the first air entry, of the other air cylinder, is connected with the air outlet or the exhaust port. According to the rotating compressor component thereof disclosed by the invention, the energy efficiency of a rotating compressor component is improved.