A systematic investigation was made for the R—M transition and recombination lasers in strontium ions by the longitudinal pulse discharge-excited with the helium buffer gas in a quartz discharge tube of 9mm inner diameter and 42cm electrode's separation. The laser power of each-line as a function of different working parameters,as well as the corresponding photo-electrical pulse waveforms were analyzed and observed for two kinds of optical cavity. A set of better operating parameters was also obtained for the multi-line strontium ion laser.