The invention relates to a combined type shutter shape crevasse fin for a heat exchanger, being an improvement of a common flat fin and comprising a substrate; wherein a plurality of pipe holes are opened on the substrate. The invention is characterized in that: a plurality of sector crevasses are punched surrounding the periphery of the pipe hole on the substrate, a bridge shape crevasse is punched between each two pipe holes in transverse direction, and a step shape crevasse is respectively punched at the two sides of the bridge shape crevasse. The invention can effectively destroy 'boundary layer' produced by fluid flowing along surface when the fin is in use to strength disturbance of the fluid and can effectively prevent deposition of solid dust in the fluid, is widely applied to oil heat exchanger and gas heat exchanger with high performance requirement in petrochemical, vessel, metallurgy, naval vessel and electricity industries, and has optimal heat transfer effect especially under the condition that the fluid field Reynold's value of the fluid is 5000-6000.