In order to identify Chinese herbal medicine aconite genuineness and varieties and control the quality of the production. The aconite samples of four different kinds of production methods are detected and analyzed by femtosecond laser excited photoconductive antenna terahertz time domain spectroscopy technology on dry environment at room temperature. The results show that：aconite terahertz time-domain spectrum contains amplitude and phase information，the frequency spectrum has good repeatability，4 aconite sample spectrum are divided into two groups. There are obvious differences of the four samples terahertz refractive indexes，which can be used for visual identification of the different production methods. As the absorption increases with frequency increasing，pure aconite tablet sample effective spectral range is 0.2~1.05THz with no obvious characteristic absorption peaks in this spectrum range，the absorption spectra are consistent with the THz frequency spectra，and therefore the differences caused due to different production methods should be considered for aconite genuineness identification.