A method for updating pre-distortion coefficients, comprising: presetting a primary table and a standby table, wherein the primary table stores default pre-distortion coefficients and the standby table stores updated pre-distortion coefficients; when a data source of a pre-distortion processor adopts the standby table, adopting the updated pre-distortion coefficients to perform parameter output processing to acquire pre-distortion parameters, and conveying the pre-distortion parameters and an input signal to the pre-distortion processor to process to acquire pre-distortion signals; conveying the pre-distortion signals through various signal processors to process to acquire a first signal, and determining the power data of the first signal; characterized in that if the power data of the first signal is above or within a setting range, continuing to adopt the standby table as the data source of the pre-distortion processor; and if the power data of the first signal below the setting range, switching the data source of the pre-distortion processor to the primary table, wherein the step of determining the power data of the first signal comprises: determining power parameters according to the continuity of the first signal; and performing the Fast Fourier Transformation on the first signal, and determining the power data of the first signal together with the power parameters, wherein the power data includes at least one of an adjacent channel power and an adjacent channel power ratio. presetting a primary table and a standby table, wherein the primary table stores default pre-distortion coefficients and the standby table stores updated pre-distortion coefficients; when a data source of a pre-distortion processor adopts the standby table, adopting the updated pre-distortion coefficients to perform parameter output processing to acquire pre-distortion parameters, and conveying the pre-distortion parameters and an input signal to the pre-distortion processor to process to acquire pre-distortion signals; conveying the pre-distortion signals through various signal processors to process to acquire a first signal, and determining the power data of the first signal; characterized in that if the power data of the first signal is above or within a setting range, continuing to adopt the standby table as the data source of the pre-distortion processor; and if the power data of the first signal below the setting range, switching the data source of the pre-distortion processor to the primary table, wherein the step of determining the power data of the first signal comprises: determining power parameters according to the continuity of the first signal; and performing the Fast Fourier Transformation on the first signal, and determining the power data of the first signal together with the power parameters, wherein the power data includes at least one of an adjacent channel power and an adjacent channel power ratio. determining power parameters according to the continuity of the first signal; and performing the Fast Fourier Transformation on the first signal, and determining the power data of the first signal together with the power parameters, wherein the power data includes at least one of an adjacent channel power and an adjacent channel power ratio.