The invention discloses an oil tea grass cultivation method. The method comprises the following steps of 1) planting environment detection, wherein the temperature, humidity and composition of planting soil are measured as a selection basis of grass species; 2) grass specie selection, wherein the grass species suitable for forests are selected according to measurement data, and selection conditions include that a, the grass species have strong adaptability; b, the grass species have the effects of well covering the ground surface, maintaining soil and water, culturing soil fertility, improvingmicroclimate and reducing pests and diseases; c, the grass species do not compete with oil tea young trees for water and fertilizers; 3) treatment before sowing, wherein irrigation, application of abase fertilizer, soil loosening and leveling, removal of soil debris and seed soaking are conducted; the cultivation method detects the soil environment before the sowing, conveniently selects the grass species which are matched with the soil environment and are beneficial to the production of an oil tea forest, is scientific and reasonable, has the effects of well covering the ground surface, maintaining soil and water, culturing the soil fertility, improving the microclimate and reducing the pests and diseases, has the strong adaptability and increases the yield of the oil tea.