Arsenic, a kind of microelement, is widespread in nature. Excessive arsenicals have bad effects on products and human health and are highly carcinogenic following chronic exposure. To choose a properly, simply and accurately analytical method is so important. The recent development of the analysis of trace arsenic is reviewed, including spectrophotography, atomic-absorption spectrometry, article prospects the combined techniques in atomic-fluorescence spectrometry and electro-chemical determination. The separation and analysis of arsenic speciation.