In order to improve the accuracy of load measurement of aircraft landing gear, the engineering method of processing the load calibration data of the telescopic landing gear structure are discussed. The mathematical relation among the three-directional loads, buffer compression stroke and strain code values of the telescopic landing gear structureareexcavated through the analysis of the actual loading situation and the calibration data of the unidirectional loading conditions.These predicted mathematical relations are substituted into the calibrated data of multi-directional loading conditions, whose accuracy is also verified.Based on these mathematical relations, the mathematical model of load-strain calibration equations for the telescopic landing gearis put forward to, which corresponds with two regression methods for calibration data. These calibration equations for two regression methods are used to calculate the three-direction loads of the landing gear in the calibration data. Then, all errors of calculatingloads are within the controllable range, showing that these calibration equationssatisfy the accuracy requirements. When these calibration equations are substituted into the measured data, the measured curves agree with the rules of the variation of loads.The application of this treatment method can effectively improve the accuracy of take-off and landing load measurement and load spectrum establishment for telescopic landing gear.