The invention discloses a method for culturing tea seedlings and relates to the technical field of tea planting. The method comprises the following steps that A, a seedling land is ridged and arranged into multiple seedling beds after deep plough, disinfection and insect killing treatment, and soil on the surface of the seedling beds is smashed and raked; B, the seedling beds are wetted, and cuttage is conducted on the seedling bed with tea branches, wherein the line space of cuttage of the tea branches ranges from 1 cm to 1.5 cm, and the tea branch space ranges from 0.3 cm to 0.4 cm; C, after the tea seedlings grow for 40 to 50 days, the tea seedlings are watered every two to three days; D, when the tea seedlings grow to be about to reach horizontal closure, trimming is conducted to make the heights of all the tea seedlings on the seedling beds identical; E, after the tea seedlings grow for 200 to 250 days, the tea seedlings are acclimatized for 90 days; F, after the acclimatized tea seedlings continue growing for 40 to 50 days, the tea seedlings can transplanted out of the seedling beds. Compared with the prior art, the method for culturing the tea seedlings can solve the problems that existing tea seedlings are low in qualified seedling percentage and high in culturing cost.