The invention relates to the technical field of manufacturing of wind power blades and discloses an embedding tool for a bolt of a blade root. The embedding tool comprises an upper die and a lower die. The upper die comprises an upper support, an upper bolt hole plate and an upper locking adjusting mechanism. The lower die comprises a lower support, a lower bolt hole plate and a lower locking adjusting mechanism. The upper bolt hole plate and the lower bolt hole plate are semicircular plates of the same specification, and bolt sleeve holes are evenly distributed in the edges of the circumferences of the semicircular plates. The upper bolt hole plate is installed on the upper locking adjusting mechanism, and the lower bolt hole plate is installed on the lower locking adjusting mechanism. The upper locking adjusting mechanism is installed on the upper support and used for fastening the upper bolt hole plate, the lower locking adjusting mechanism is installed on the lower support and used for fastening the lower bolt hole plate, and the upper bole hole plate and the lower bolt hole plate are adjusted through the upper locking adjusting mechanism and the lower locking adjusting mechanism correspondingly to be aligned with each other. A whole circular plate is formed by the upper bole hole plate and the lower bolt hole plate, and a preset included angle is formed between the circular plate and the horizontal plane. By means of the tool, the bolt can be embedded at the root during manufacturing of a blade, a large amount of time is saved, in addition, precision is high, and errors are small.