Abstract: In order to avoid the interference of high contents of chloride ions in edible fungi on the determination of perchlorate, chlorate, bromide ion, and bromate, and reduce the detection limits, the study mentioned by title was proposed. A fresh homogenized edible fungi sample (10.0 g) was taken and placed in a 50.0 mL-centrifuge tube, and 40.0 mL of water was added. The mixture was oscillated for 30 min, made its volume up to 50.0 mL with water, and centrifuged for 5 min. The supernatant was filtered through a 0.22 µm water phase filter membrane, and the filtrate was analyzed by the ion chromatography. Using Dionex IonPac AS19 chromatographic column as the analytical column, potassium hydroxide solution was used for gradient elution. The valve switching time was set at 0-5.8 min in waste discharge mode and 5.9-25.0 min in injection mode, and the above 4 anions in the filtrate was detected by conductivity detector. As shown by the results, linear relationships between values of the mass concentration and the response intensity were kept in the range of 10.0-1 000.0 μg · L⁻¹ for perchlorate, chlorate and bromate, and 1.0-1 000.0 μg · L⁻¹ for bromide ion, with detection limits (3S/N) in the range of 5.0-50.0 μg · kg⁻¹. Test for recovery was made by the standard addition method, giving recoveries in the range of 80.1%-96.5%, with RSDs (n=6) of the determined values in the range of 2.1%-4.2%. This method was used for analysis of 30 edible fungi samples, the detection amounts of perchlorate were in the range of 50.0-3 213.6 μg · kg⁻¹, the detection amounts of bromide ion were in the range of 214.1-1 236.5 μg · kg⁻¹, and chlorate and bromate were not detected.