Abstract: In order to investigate the soil fertility status of farmland in Longhai, soil samples were taken and the variation trend of soil nutrients was analyzed compared with the data of the second soil survey data. The results showed that the soil generally appeared to be acidification trend with the pH value dropped by 0.2 units, the content of total nitrogen, hydrolyze nitrogen, available potassium and organic matter increased by 47.8%, 82.5%, 82.5% and 39.1% respectively, and the content of available phosphorus increased 11.3 folds. According to these results, the scientific fertilization recommendations were also proposed.