The invention discloses a method for calculating the damping oil amount of an automobile fuel gauge and belongs to the field of automotive electronics. According to the method, oil consumption in a sampling period is calculated according to a speed value and a set maximum average oil consumption value, the damping oil amount calculated previously and the instantaneous oil amount obtained through sampling in the current period are compared, and the current damping oil amount is obtained through reduction or addition of the oil consumption of the period on the basis of the damping oil amount calculated previously; the value of each sampling period is smaller, the change of the calculated damping oil amount is slight, however, calculation is performed according to the maximum average oil consumption, so that the change of actual oil consumption can be tracked, and the defect that real-time tracking of oil consumption of an automobile under various road conditions and stable responding cannot be realized both with the fixed response rate or the fixed damping coefficient calculation method is overcome.