To correctly sort MIMO radar signalsa new reconnaissance method is presentedwhich can make multiple reconnaissance planes collect radar signals in multiple positions at the same timeand multiple independent observations can be obtained.The blind source separation algorithm of complex maximization of nonGaussianity (CMN) is utilized to sort MIMO radar signals.Simulation results show that a separation performance of -10 dB can be achieved with SNR as 6 dB for several typical orthogonal waveforms such as phasecoded and frequency division liner frequency modulation waveforms without considering the amplitude fluctuation.The relative analysis of separated waveforms also demonstrates the validity of the method.