Laser ablation fast pulse discharge plasma spectroscopy (LA-FPDPS) technique is used to analyse aluminum alloy. The optical emission spectra are recorded using this technique. From the measured spectra, the signal-to-noise ratio (SNR) and the relative standard deviation of several elemental lines are derived. Compared with the spectrum obtained from laser induced breakdown spectroscopy, the optical emission intensity and SNR in the LA-FPDPS spectrum of aluminum alloy increase greatly. The measurement precision in terms of relative standard deviation is improved as well. In addition, several calibration curves for trace elements analysis in aluminum alloy are obtained using LA-FPDPS technique, which can be used for quantitative analysis of those corresponding elements.