The content of the trace elements( Ca,Fe,Zn,Cu,Se,Mn,Mg) of Luohanshen was determined.The microwave digestion and inductively coupled plasma( ICP) atomic emission( AES) internal standard method( using Ni as internal standard) to determine trace element contents was established. The microwave digestion conditions and analysis parameters were optimized. The relative standard deviation( n = 5) measured was less than 3. 02%. The linear correlation coefficients were between 0. 995 4 to 0. 995 7. The average recoveries were between 98. 0% to102. 5%. The detection limits of the seven elements( Ca,Fe,Zn,Cu,Se,Mn,Mg) obtained were between0. 001 mg / L to 0. 2mg / L. The method has many advantagessuch as,high sensitivity,low detection limit,wide linear range,low interference,high selectivity,rapid determination of multi elements,etc. The results are satisfactory to determine the trace elements of Luohanshen.