Objective Reasonably set up and implement the measurement and calibration scheme of the yoke magnetic particle flaw detector, including calibration demand analysis, calibration preparation, calibration implementation, calibration work after calibration, calibration summary and analysis, etc., to improve the lifting force, safety, permeability and sensitivity of the yoke magnetic particle flaw detector. Methods Taking the CDX-III magnetic yoke magnetic particle flaw detection machine as an example, the calibration implementation preparation, working environment simulation, power inspection, insulation resistance and strength test, current error test, current measuring device access, sensitivity detection and other specific schemes were reasonably designed. Experimental research method was adopted to analyze the rationality of the calibration scheme through experimental results. Results Through the use of this measurement calibration scheme, the lifting force, safety, permeability and sensitivity of the yoke magnetic particle flaw detection machine can be improved to meet the national metrology standards and requirements. Conclusion This measurement calibration scheme has systematic and fine characteristics, and pays attention to the use of environmental simulation, enhance its practicality and rationality, more comprehensive and accurate, worthy of promotion and use.