Blade root connecting structure of wind-driven generator and manufacturing method of blade root connecting structure

The invention discloses a blade root connecting structure of a wind-driven generator. The blade root connecting structure is that a blade of the wind-driven generator is of a hollow structure, and glass fiber reinforced plastics are the main structural materials of the blade; the blade comprises a half block serving as a front surface, and another half block serving as a back flow surface, wherein housings of the two half blocks are integrally adhered; the root end of the blade is regularly circular; a plurality of connecting bolts, which are circumferentially uniformly distributed and connected with a hub of a wind wheel, are arranged on the end surface of the root of the blade; a transition connecting part is arranged at the root part of the blade and fixedly connected with the blade; the connecting bolts are arranged on the transition connecting part. According to the blade root connecting structure of the wind-driven generator, circular metal barrels are adopted for performing transition connection, so that the blade can be avoided secondary damage during hole drilling; the quantity of the connecting bolts and the pitch circular diameter can be flexibly adjusted according to the dimension requirements of hubs of different units; in addition, the quantity of the connecting bolts is more than that of the connecting bolts in the previous methods, so that the design requirements can be met.