Single-cylinder bolt hole site parameter correction method and system and crane

The invention relates to the technical field of engineering machinery, in particular to a single-cylinder bolt hole site parameter correction method and system and a crane, and the single-cylinder bolt hole site parameter correction method comprises the steps that in the arm pin inserting process, the original position parameter range of a target hole site is obtained; a telescopic oil cylinder is controlled to drive the target arm to stretch and retract back and forth between the original arm stretching maximum value and the original arm retracting minimum value in the original position parameter range, the original stretching and retracting times are recorded, and meanwhile the arm pin inserting action is conducted; when the original stretching and retracting times are larger than or equal to a preset original stretching and retracting times threshold value and the current target arm pin is not successfully inserted, the target arm pin is inserted into the target hole position by expanding the stretching an