GB/T 17141-1997 stipulates a method for the determination of lead and cadmium in soil by graphite furnace Atomic absirption spectrometer-tometry, AAS. First, the soil sample is digested to release lead and cadmium into the solution. Then the graphite furnace Atomizer is used to atomize lead and cadmium, and the content of lead and cadmium in the soil is accurately calculated by measuring the degree of absorption of specific wavelength light. The standard provides a high sensitivity and accuracy measurement method for soil mass detection, which is helpful to accurately evaluate the status of soil pollution by lead and cadmium and ensure soil ecological security.