The invention discloses a piston type two-stroke fan, and relates to the technical field of air blowers. According to the specific technical scheme, the two-stroke fan is composed of a two-stroke fanair cylinder, a speed adjustment motor, upper dual pulleys, lower dual pulleys, hollow bolts, thrust bearings, an upper rolling wheel, a lower rolling wheel, an upper one-way air inlet valve, a lowerone-way air inlet valve, an upper one-way air outlet valve, a lower one-way air outlet valve, a lower one-way air outlet pipe, an annular rope, a piston type air plate, an upper chain wheel, a lower chain wheel, a chain, a rotating shaft telescopic buckle and a support. The piston type two-stroke fan has the advantages that the two-stroke fan is long in stroke, low in stroke frequency, large in cylinder diameter, large in blast capacity, high in air pressure and low in noise and is suitable for multiple scenes achieving spaced air blowing.