The invention discloses a full coherence accumulation time-frequency domain parallel capturing method based on FFT, in order to quickly capture a burst direct sequence spread spectrum signal with low signal to noise ratio and large frequency offset. The full coherence accumulation time-frequency domain parallel capturing method disclosed by the invention comprises two realization parts: pseudo code correlation based on FFT and full coherence accumulation based on FFT. Two methods of symbol correlation and zero complement FFT are used for further reducing the sinc loss in a pseudo code correlation process and the scallop loss in an accumulation process. The parallel capturing method is used for reducing the consumption of processing resources by the buffer of a large amount of intermediate data information and a parallel processing architecture based on FFT, obtaining a very high signal to noise ratio of a correlation peak within a short time, precisely evaluating Doppler frequency offset in a parallel search process of a pseudo code phase and reducing the average capturing time.