The invention relates to a blower driven by a double-cylinder gasoline engine and pertains to the technical field of garden machines. The blower is characterized by being driven by the double-cylinder gasoline engine. A crankcase body of the double-cylinder gasoline engine is fixed on a blower shell body (9) by screws. Two cylinder bodies provided with spark plugs (3) are respectively fixed at the two sides of the crankcase body of the double-cylinder gasoline engine. Under the effect of a starter (5), the double-cylinder gasoline engine starts to work. A fan propeller fixed on a magnetoelectric generator rotor is driven to rotate by the rotation of a crank shaft; high-pressure air in the blower shell body (9) goes through a siphon (10), a tube (11) and a straight tube (12) and is spurtedout by a sprayer (13). An infusion switch (23) is turned on and liquid is blown out by the sprayer (13) through an infusion tube (24) from a liquid box (25). Compared with the prior art, the blower has the advantages that: as two cylinders are adopted, air discharge capacity is increased; and infusion device is added, thereby greatly improving the efficiency of cleaning garden, blowing snow on roads and extinguishing fire by blowing for forest regions and grasslands.