The prospecting condition test on the portable XRF analyzer of IED2000P was conducted in the Jingzhou silverpolymetallic mining area of Jixi, Anhui Province. Based on a comparative study of different densities of survey points, rocks and soils, different humidity conditions, and measurements of rock and its powder, the authors determined the best application conditions. The size of anomaly and real workload should be considered when the density of survey points is to be chosen. The XRF measurement of rock is better than that of soil in that the former reflects the anomaly characteristics of a geological body more objectively. The humidity factor can reduce anomaly intensity but cannot eliminate an anomaly. The XRF measurement of rock powder is better than that of rock. The comparative study and correlation analysis between the XRF measurement and the sample analysis of geochemical primary halo show that the prospecting method with the XRF analyzer is a convenient, fast and effective prospecting method.