A method for the vertical calibration of an agricultural machine wear tool is provided. The method includes: placing the wear tool in contact with a reference area； measuring the value of a position variable linked to the positioning of the wear tool when it is in contact with the reference area； determining the theoretical vertical positioning component of the wear tool according to the value measured, based on a reference curve； and determining a matching curve between a vertical positioning component of the wear tool and the position variable, by shifting the reference curve by a value equal to the theoretical vertical component.
