Abstract: A scroll compressor and an air conditioning system are provided. The scroll compressor has a housing, a compression mechanism portion, a main frame, a motor, a crankshaft, a main balancing block and an exhaust pipe. In a radial direction of the housing, the exhaust pipe extends into the housing at a depth W, and an outer peripheral wall of the main balancing block is located at a distance L from an inner wall of the housing, where 0.47?W/L?0.93. In this way, a part of a high-pressure oil-gas mixture generated by the compression mechanism portion is discharged through cyclone separation of the main balancing block and mechanical separation of the housing; and the other part of the high-pressure oil-gas mixture flows into an axial channel to achieve oil and gas separation while cooling the motor, and is subsequently discharged.