An airflow circulating system for refrigerator comprises an air delivering apparatus, an air inlet and an air duct, the air delivering apparatus is an cross flow fan which is arranged on the upper part of the air duct and on the lower part of the air inlet, a volute tongue is provided on the air duct of the inner side of the cross flow fan, a volute casing is provided on the air duct of the outer side of the cross flow fan; the shaft line of the cross flow fan can be perpendicular to the lateral face of the refrigerator, the rotation direction of the cross flow fan directs to the air inlet; the volute casing is big arc-shaped and spiral line-shaped, the tip terminal shape of the volute tongue is circular arc-shaped; the cross flow fan comprises 2-6 impellers; each impeller comprises n blades with different centre angles and end sheets; the neighboring impellers are staggered with a certain angle along the circumferential direction. The airflow circulating system can be used for an wall hanging type air conditioner indoor set, an air curtain machine, an air heater and a dehumidifier. The invention has low flowing noise, is easy to be deposited inside of the air duct, can greatly reduce the refrigerator air duct dimension when applied to the refrigerator, thereby improving the refrigerator volume.