Abstract: A correction method for source stability error in time domain antenna planar near-field test was proposed. Firstly, a reference channel was built for error correction to analyze the items included in source error. Then, considering two methods for near-field reconstruction and near/far-field translation in time domain measurement, methods called time domain-frequency domain combining correction and time domain correction were developed respectively, which could correct error in sampling signal caused by stability error of source. Finally, practical measurements were implemented for the method. Results show that, the modified frequency-domain pattern and the time domain waveform are in better agreement with the reference results, which proves the correctness of the two correction methods.