The invention discloses a method for measuring and calculating the magnetic field induced phase transition temperature shift in a variable magnetic martensite phase change Heusler alloy. The method comprises the following steps: 1) placing a sample in a vibrating sample magnetometer, and vacuumizing the vibrating sample magnetometer; 2) loading the vibrating sample magnetometer into the magnetic field HM of the magnetic field induced martensite phase change size, and waiting for the magnetic field to be stable; 3) setting a test temperature in the magnetic field determined in step 2), settingcontinuous field sweep under the magnetic field from -HM to 0 and from 0 to HM, and testing the R-H curve of the resistance R of the sample with the change of the magnetic filed; 4) changing the testtemperature under the magnetic field determined in the step 2), and repeating the test process in step 3); and 5) calculating the size of the magnetic field induced phase transition temperature shiftat different temperatures according to the R-H curves at all temperatures, obtained in step 4). The macroscopic resistance change caused by the different characteristics of the magnetic transport property in every phase change stage during phase change is used to analyze and calculate the phase change temperature shift; and the method has the advantages of few required test data, simple calculation process and reliable result.