The GB/T 17138-1997 standard specifies the determination method of copper and zinc content in soil, using flame Atomic absirption spectroscopy-tometry, AAS. First, the soil sample is digested to dissolve the copper and zinc elements. Next, the flame atomic absorption spectrophotometer is used to make the copper and zinc atoms absorb specific wavelengths of light. By measuring Absorbance, the content of copper and zinc in the soil is accurately calculated according to the standard Linear dispersion. The standard provides a reliable means for soil mass detection, which helps to evaluate soil fertility and pollution status and ensure soil ecological health.