The utility model discloses a resin coating device of optic fibre production usefulness belongs to the optic fibre production field, and the device includes cavity (3) and be fixed in backup pad (6) in cavity (3), cavity (3) bottom be inside incurvate trumpet - shaped, the upper portion rigid coupling of cavity has derivation mouth (2), derivation mouth (2) central authorities be equipped with thepassageway that supplies optic fibre to pass through, this passageway is coaxial with the horn mouth of cavity bottom, derives mouth (2) and cavity (3) intercommunication, is provided with extra large sponge body (4) on backup pad (6), extra large sponge body (4) systematic is with the liquid resin that coats. The utility model discloses optic fibre upwards passes through optic fibre coating device bottom the cavity, it influences the deposited to reduce resin gravity, therefore it is effectual to coat, and the coat is even, and the product quality who produces is good.