Abstract: The effects of the harvesting of eucalyptus and the influence of different harvesting periods on the internal structure of the soil were analysed in Lingchuan County, Guilin City, and the evolution rules were summarized. The results showed that the content of organic matter was 10.1 g per kilogram of soil in the region after eucalyptus felling, and the content was low. The soil was acidic and its pH was 4.8. The content of available phosphorus, total nitrogen and available potassium in each kg of soil was 1.4 mg,1.095 g and 65 mg, respectively, in which the available phosphorus content is extremely low, the total nitrogen and available potassium content is moderate, and the cation exchange rate and quantity in the soil are all decreased, indicating that the soil fertility is extremely low at this time.

Key words: cutting land, soil nutrients, organic matter, North of Guibei