The effects of dopant variety,dopant content and dopant wavelength on tetraamnine bis(5-nitrotetrazolato) cobalt(Ⅲ) perchlorate(BNCP) semiconductor laser sensitivity were studied by doping different dyestuffs into BNCP. Results show that the laser ignition threshold value is reduced apparently by adding appropriate dopant variety and dopant content. In 635 nm wavelength,the ignition energy of BNCP doped with 5% copper phthalocyanine is the lowest,and the laser 50% initiation threshold value and the initiation explosive average delay time of BNCP are 0.24 mJ and 2.3 ms. And for BNCP doped with 5% carbon black, the laser 50% initiation threshold value and the initiation explosive average delay time of BNCP are 0.57 mJ and 5.5 ms. In 915 nm wavelength,the 50% ignition threshold value of BNCP doped with 5% carbon black is the lowest (5.06 mJ).