OBJECTIVE： To establish a method for simultaneous determination of 30 kinds of microelements in Mallotus apelta from Guangxi. METHODS： ICP-MS method was adopted. The radio frequency power was 1 550 W， the sampling depth was 10 mm， the carrier gas velocity was 1.05 L/min， the atomizing chamber temperature was 2 ℃， and the peristaltic pump was 0.10 rps.The collision mode was He， and the gas flow rate was 4.2 mL/min. RESULTS： The linear ranges of aluminum， vanadium， chromium， manganese， iron， nickel， copper， zinc， gallium， arsenic， cadmium， antimony， molybdenum， rubidium， cesium， barium， lanthanum， cerium， praseodymium， neodymium， europium， gadolinium， dysprosium， holmium， erbium， lutetium， mercury， thallium， lead and uranium were 10-1 000 ng/mL（r＝0.999 9）， 0.1-5 ng/mL（r＝0.999 9）， 0.1-5 ng/mL（r＝0.999 9）， 10-1 000 ng/mL（r＝0.999 9），10-1000 ng/mL（r＝0.999 9），0.1-5 ng/mL（r＝0.999 7）， 0.5-100 ng/mL（r＝0.999 7），1-500 ng/mL（r＝0.999 8）， 1-100 ng/mL（r＝0.999 7），0.5-50 ng/mL（r＝0.999 9），0.5-50 ng/mL（r＝0.999 9）， 0.1-10 ng/mL（r＝0.999 9）， 0.1-10 ng/mL（r＝0.999 9）， 0.1-10 ng/mL（r＝0.999 9）， 0.1-10 ng/mL（r＝0.999 9），1-500 ng/mL（r＝0.999 9）， 0.1-10 ng/mL（r＝0.999 9）， 0.1-10 ng/mL（r＝0.999 9），0.1-10 ng/mL（r＝0.999 9）， 0.1-10 ng/mL（r＝0.999 8）， 0.1-10 ng/mL（r＝0.999 9），0.1-10 ng/mL（r＝0.999 9）， 0.1-10 ng/mL（r＝0.999 9），0.1-10 ng/mL（r＝0.999 9）， 0.1-10 ng/mL（r＝0.999 9）， 0.1-10 ng/mL（r＝0.999 8）， 0.1-5 ng/mL（r＝0.998 4），0.1-10 ng/mL（r＝0.999 9），0.5-100 ng/mL（r＝0.999 7），0.1-10 ng/mL（r＝0.999 9）， respectively. The limits of quantitation were no higher than 0.44 mg/kg， and the limits of detection were no higher than 0.11 mg/kg. RSDs of precision， stability and reproducibility tests were no more than 10.0％. The recoveries were 80.45％-116.68％（RSD ranged 0.47％-5.83％，n＝6）. The contents of Mn， Ba Fe and Al in samples were the highest.  CONCLUSIONS： The method is simple， precise， stable and reproducible， and can be used for simultaneous determination of 30 kinds of microelements in M. apelta from Guangxi. The contents of harmful elements are in line with national standard.