The invention belongs to the technical field of heat exchangers, which relates to an enhanced heat transfer fin. Waveform fins are formed on a flat and straight substrate of a corrugated plate, the waveform fins are raised on the flat and straight substrate and form certain angle with the flat and straight substrate, reversing areas are arranged between a plurality of the waveform fins and divide the waveform fins into a plurality of groups waveform fin areas with different numbers of ripples, the wavelength and the wave amplitude of each waveform fin in each group are equal to each other, the number and the wavelength of the waveform fins of different groups are no equal to each other, and the number of the waveform fins in each group of the waveform fin area decreases in turn in the whole fin length while the wavelength increases in turn. The enhanced heat transfer fin of the invention has good heat transfer property and small resistance, and is suitable to serve as a heat transfer fin of an automotive heat exchanger, a water tank radiator, a pressurizing intercooler and a wind cooling type hydraulic oil cooler.