A confidence test method based on Kolmogorov-Smirnov hypothesis test is proposed to evaluate the blind processing results of BPSK signals.The hypothesis test model is created at first.The reference signals are constructed depending on the certain identified modulation result and the phase series are extracted from the correlation between the reference signals and the observed signals.By computing the empirical cumulative distribution function of the phase series and comparing it with the specific cumulative distribution function of phase series under null hypothesis

the K-S based confidence test is performed.Simulation results show that the proposed method can be used to verify the confidence for blind processing results of BPSK signals at low signal-to-noise ratio.