The invention relates to a portable metallic element analyzer, which analyzes the composing components and the relative contents thereof of various metallic elements in ores through character X-ray spectrums which are triggered out from various metallic elements by a computer according to the moseley' s law, and obtains metallic elements which are contained in ores and the contents of various metallic elements. A radioactive source and a detector conserve the final character X-ray spectrum through shielding a collimator and processing by multi-channel pulsed signals, and the final character X-ray spectrum is transmitted to a notebook computer through a USB interface immediately or after a period, and the species and the content of metallic elements which are contained in ores are finally got through spectrum deconvolution software to analyze the shape of the spectrum. The portable metallic element analyzer can directly measure ores in fields, which is convenient to carry and use, and the accuracy is high.