Abstract: Based on the high resolution continuous light source atomic absorption spectrometer, the accurate determination of heavy metals such as arsenic, mercury, high temperature elements such as aluminium, titanium, tin and high salt samples can be realized through the modification of the hardware system, the installation of relevant accessories and the upgrading of software. Thus, the expansion of the functions of the instrument and the promotion of its application scope can be realized, and a more comprehensive analysis of inorganic elements can be provided for the relevant research work.