Abstract: In the simultaneous determination of boron, tin, silver, molybdenum and lead by AC arc emission spectrometry, to improve the solid powder sample pretreatment method, the mass ratio of sample to buffer was 1∶2, and the sample was put in a crucible with its mouth covered with a plastic wrap and then placed on a vibrating stirrer, and then mixed and stirred at 2 400 Hz for 30 min, and analyzed on a CCD-I AC arc direct reading atomic emission spectrometer. The method solved the problems of matrix effects and spills occurring during the sample pre-treatment, stabilized the ratio of sample to buffer, avoided the cross-contamination, and reduced accidental errors caused by non-uniform mixing. The precision of this method were (RSD, n=12): B 4.62%~8.97%, Sn 3.89%~8.43%, Ag 3.39%~7.34%, Mo 4.35%~8.46%, Pb 4.27%~7.63%. The experimental results showed that the analytical results of the method are accurate and reliable, with good precision, simple and fast operation, and has certain practicality, which provides a new scheme for the application of AC arc emission spectrometry.