The invention belongs to the technical field of aero-engine starting control, and particularly relates to a self-adaptive adjusting method and
system for the initial
fuel supply amount of engine ground starting. The method comprises the following steps: S1, acquiring a slight anomaly statistical value pre-stored in an
airborne system; s2, according to a given initial
oil supply amount adjustment step length and a slight anomaly statistical value, determining a down-regulation amount compared with original ground starting
oil supply; step S3, determining the down-regulated ground starting
oil supply amount; s4, ground starting oil supply is conducted on the engine on the basis of the reduced ground starting oil supply amount; s5, the ratio of the engine exhaust temperature variable quantity to the engine high-pressure rotating speed variable quantity in the ground starting process of the engine is obtained; and S6, determining whether the ground starting of the engine is abnormal or not according to the ratio and a given slight
abnormality criterion threshold value, if so, adding 1 to the slight
abnormality statistical value, and storing the slight
abnormality statistical value in an
airborne system. According to the invention, the adjustment
workload of ground maintenance personnel is reduced.