The invention discloses a verification platform implementation method of an artificial noise assisted MISO system based on software radio. A transmitting end performs convolutional encoding on confidential data to carry out QPSK modulation and STBC space-time coding. Then, a null space between the transmitting end and a legal receiving end is found by using channel information fed back by channelestimation of the legal receiving end. Finally, based on the artificial noise generated in the null space, artificial noise and secret data after the STBC space-time coding are transmitted out together, and the legal receiving end and the illegal eavesdropping end correspondingly perform space-time decoding, demodulation and convolution decoding. According to artificial noise technology, the noise level difference between a legal receiver and an illegal eavesdropper is artificially increased, and the safe communication rate of the system is improved, so that the confidentiality of communication is ensured; and the effectiveness of an artificial noise scheme, a power distribution scheme and the like is verified.