A solid mercury analyzer was used to measure the mercury in the soil by using a multi-standard soil sample (n > 20) to draw a calibration curve method and a single standard soil sample to draw a calibration curve method. The results showed that the detection limits of the two methods were 0.30 and 1.49 ng, respectively, and the relative standard deviations of the parallel samples (n = 6) were 3.6% to 4%, 5. 4% to 9. 0. %, the repeatability precision within 90 days was 4.1%, and the national soil standards were measured, and the results were in agreement with the standard values. It shows that compared with the single standard soil sample drawing calibration curve method, the standard curve method for multi-standard soil samples has better precision, lower detection limit, stronger applicability, and effective shortening due to long-term stability of the calibration curve. The detection period of mercury in the soil.