The utility model provides a filament guide button in a reeling machine, comprising a mounting bracket shaped by a metal plate, a first working piece and a second working piece, wherein the first working piece, the second working piece and the mounting bracket are fixedly connected, the first working piece is parallel to the second working piece and also parallel to the metal plate in the working piece mounting area in the mounting bracket, a first groove is arranged on the first side of the first working piece, a second groove is arranged on the first side of the second working piece; the first side of the first working piece is laminated with the first side of the second working piece along the direction perpendicular with the working piece, a threading gap is arranged between the first side of the first working piece and the first side of the second working piece, the first groove is laminated with the second groove to form a filament guide button in a closed round hole or an approximate round hole. The filament guide button conveniently threads the filament. Compared with the prior fixed type zero-threading filament guide button, the position and shape cooperation between the first working piece and the second working piece are easier and the production is more accurate and the round shape of the guide button is increased to the utmost limit.