Gamma sensor full-temperature range compensation method

The invention discloses a gamma sensor full-temperature range compensation method, including the steps of: firstly determining a temperature point selecting method for a gamma sensor full-temperature compensation test; selecting sample data section corresponding to each temperature point by a data window, to meet that the data error in the window in the minimal; detecting abnormal values of the gamma sensor measured values in the data sections and removing the same to allow the result to accord with three criteria; selecting a proper primary function to establish a gamma sensor measured value full-temperature compensation model, providing a model evaluation function during a model parameter solving process to find the minimal value of the evaluation function by continuously iterating, wherein the primary function weighting coefficient and primary function number corresponding to the minimal value are the optimal gamma sensor measured value full-temperature compensation model parameters. By using the method, errors caused by temperature drift of the gamma sensor can be eliminated, compensation in the full-temperature range can be achieved, and thereby measurement accuracy of the instrument is improved.