Abstract:GFAAS was used for the direct determination of plumbum in Haematococcus pluvialis powders，the instrument parameters were discussed and optimized.The method of TPD was applied to deal with the samples,and NH4H2PO4 was added as matrix modifier,and then the content of plumbum was measured by graphite furnace atomic absorption spectrometry (GFAAS).This method is accurate and reliable.It can be used in measuring the content of plumbum in Haematococcus pluvialis powders,so it is important to food Safety.