Abstract: At specific wavelengths, the effects of different mass concentrations of soil matrix and easily ionizable elements on determination of 6 metal elements (zinc, manganese, copper, nickel, cobalt, and vanadium) by inductively coupled plasma atomic emission spectrometry (ICP-AES) were compared. As shown by the results, a certain correlation between soil matrix interference and easily ionizable element interference. Negative interference was observed for all 6 metal elements, with significantly greater interference on copper, nickel and cobalt compared to zinc and vanadium. By selecting the sodium chloride solution with sodium mass concentration of 1 000 mg·L⁻¹ as the matrix for drawing calibration curves, the interference from the soil matrix with a sample mass of 0.3 g could be calibrated, thereby achieving accurate determination results. Using the sodium matrix matching method, linear relationships between the corresponding emission intensities and mass concentrations of 6 metal elements were found in definite ranges, with detection limits (3.14s) in the range of 0.1-0.5 mg·kg⁻¹. Accuracy tests were conducted on 6 soil composition analysis standard materials, and the relative errors of the determined values ranged from -3.8% to 4.0%. Precision test was conducted on the soil composition analysis standard material GSS20, and RSDs (n=6) of the determined values ranged from 1.8% to 4.0%. This method was applied to analysis of 3 different environmental soil samples, and the obtained results were consistent with those of wavelength dispersive X-ray fluorescence spectrometry.