Fuel tank with high volume utilization rate

The invention relates to a fuel tank with a high volume utilization rate, which aims to overcome the shortcoming that a fuel suction tube of an existing fuel tank cannot suck fuel when fuel quantity of the existing fuel tank is low and the fuel tank is inclined. The fuel tank comprises a tank body, a bottom plate of the tank body is a flat plate, a fuel extracting tube is arranged in the tank body, a swinging rod which is parallel to the bottom plate of the tank body is disposed at the bottom of the tank body, one end of the swinging rod is rotatably connected with the bottom plate of the tank body via a pivot, the swinging rod can rotate around the pivot in a plane parallel to the bottom plate of the tank body, and a fuel suction end of the fuel extracting tube is fixed at a swinging end of the swinging rod. The fuel suction end of the fuel extracting tube of the fuel tank moves at the bottom of the fuel tank along with swinging of the swinging rod, when the fuel quantity is low and the oil tank is inclined,