The utility model discloses an anti-stealing fuel tank. The technical scheme is mainly characterized in that the anti-stealing fuel tank comprises a fuel filler, at least two crosswise staggered semicircular D-type baffles are fixed on the inner wall of the fuel filler, and the sum of the horizontal areas of each two adjacent semicircular D-type baffles is greater than or equal to the horizontal sectional area of the fuel filler. By the anti-stealing fuel tank, fuel can be effectively prevented from being smoothly stolen by a fuel stealer by inserting a fuel sucking pipe into the fuel tank from the fuel filler of the fuel tank, so that barriers are arranged for fuel stealing of the fuel stealer, fuel stealing difficulty is increased, and safety of fuel in the fuel tank is guaranteed. Besides, the anti-stealing fuel tank is simple in structure, high in anti-stealing performance, safe, firm, reliable and the like.