Considering that the Digital Down Conversion (DDC) filtering may cause phase delay of signal, and the received Global Navigation Satellite System (GNSS) signal has Doppler frequency shift, we present here a DDC compensation technique applied to GNSS signal.Through analyzing the frequency-domain characteristic of input IF digital signal of the filter, the phase difference between the input signal and the filtered signal is obtained.The filtered signal multiplies the phase factor after FFT and then restores the original signal phase through IFFT, which can compensate the phase delay and Doppler frequency loss caused by DDC.Comparison is made to the originally received data and the one after DDC compensation, and the result shows that the code phase delay can be correctly compensated and Doppler frequency can be correctly acquired by the GNSS software receiver.