The invention discloses a method for improving forest land soil with earthworms. The method is characterized by including the steps of (1) preparing earthworm feed raw materials; (2) determining the earthworm putting time; (3) determining the quantity of put earthworms and earthworm feed; (4) carrying out overall scarification. According to the method for improving the forest land soil with earthworms, the feed in step (1) can be used as earthworm feed and also can play a role of fertilizer supply. By introducing earthworms into forest land, on one hand, the physical properties of soil can beadjusted, soil can be improved, and plant growth can be promoted; on the other hand, the nutrient content of soil can be obviously increased, the fertility of soil can be enhanced, pests and diseasescan be effectively prevented, and the morbidity of plants can be reduced. Thus, the method is an extremely effective measure for solving soil degradation and environmental problems in forestry production.