The invention provides a fault diagnosis method and device for an electro-hydraulic servo valve, a computer readable storage medium and electronic equipment. The method comprises the following steps:acquiring data of a plurality of electro-hydraulic servo valves; dividing an obtained characteristic curve into an upper half part characteristic curve and a lower half part characteristic curve by taking a flow value as an boundary; calculating a flow difference value of the upper half part characteristic curve and the lower half part characteristic curve, which correspond to the same current value; adopting a Kolmogorov-Smirnov method to verify whether each flow difference value meets Gaussian distribution or not; if each flow difference value meets Gaussian distribution, calculating a meanvalue and standard deviation of the flow difference value of the upper half part characteristic curve and the lower half part characteristic curve of each electro-hydraulic servo valve; separately performing statistiacal verification on each electro-hydraulic servo valve by F-test based on statistics, and judging whether each electro-hydraulic servo valve has faults or not. The method and the device realize efficient and accurate diagnosis for faults of the electro-hydraulic servo valves, and provide large data basis for electro-hydraulic servo valve fault identification.