High-volume utilization rate fuel tank

The invention relates to a high-volume utilization rate fuel tank which solves the defect that fuel is not sucked by a fuel sucking pipe when the traditional fuel tank has little fuel and inclines. The fuel tank comprises a tank body, wherein a fuel sucking device is arranged in the tank body and comprises a fuel sucking joint, a fuel sucking soft tube and a fuel sucking nozzle, wherein one end of the fuel sucking soft tube is fixed on the middle-upper part of the tank body through the fuel sucking joint, the other end of the fuel sucking soft tube is connected with the fuel sucking nozzle, the fuel sucking nozzle is arranged on the bottom of the tank body, and the fuel sucking nozzle can slide to a low position from a high position of the tank body under the action of the gravity. When the fuel tank has little fuel and inclines, the fuel sucking nozzle can move to a fuel accumulation area at the low place of the fuel tank so that fuel can be sucked without causing stalling of an engine, therefore, the requir