The invention provides a method for correcting the temperature effect of a space radiation dosimeter sensor. In the method, through RADFET sensor threshold voltage data and ambient temperature data actually measured by a space radiation dosimeter in an orbit, a relationship curve between the threshold voltage of the sensor and temperature changes is acquired so as to remove the influence of an RADFET temperature effect on space radiation dose detection; and the threshold voltage caused by the RADFET sensor which is only affected by space radiation at each moment is calculated, and through a calibration curve, the accumulation dose of the space radiation is finally acquired. By using the method, the ground temperature test of the sensor does not need to be performed, the influence brought by different sensor temperature effect differences is avoided, and the method can be used to simply and effectively correct an RADFET sensor threshold voltage.