Fin of fin type heat exchanger, fin type heat exchanger and duct type air conditioner

The utility model discloses a fin of a fin type heat exchanger, the fin type heat exchanger and a duct type air conditioner, the fin type heat exchanger comprises a heat exchange tube, the fin comprises a body portion, the body portion comprises a plurality of through holes used for penetrating through the heat exchange tube, and the body portion comprises a plurality of through holes used for penetrating through the through holes. The body part comprises at least one first turbulent flow group, each first turbulent flow group comprises a plurality of shutters, each shutter is connected with the body part, and a first air flow channel is defined between every two adjacent shutters. Therefore, by arranging the first turbulent flow set, the first turbulent flow set can play a role in turbulent flow on the air flow, the time for the air flow to flow through the fins and the heat exchange pipes is prolonged, the heat utilization rate of the heat exchange pipes is increased, the air flow can be subjected to sufficient heat exchange, and the heat exchange performance of the fin type heat exchanger is improved.