The utility model discloses a novel mouthpiece component of a bulb-blowing machine. The mouthpiece component comprises a clamping sleeve with a hollow structure, wherein a blowing pipe is arranged in the clamping sleeve; the lower end of the blowing pipe is attached to the clamping sleeve, the diameter of the upper end of the blowing pipe is gradually reduced in an outward extending process, and the upper end of the blowing pipe is bent outward after extending out of the clamping sleeve; a circle of regulating rings are fixed on the upper part of the blowing pipe; and grooves are milled on the upper part of the clamping sleeve corresponding to the positions of the regulating rings. The novel mouthpiece component is simple in structure and convenient to use, and can be used for effectively blowing structures and shapes in glass bulbs to increase the whole beautiful appearance, so that the operation difficulty can be reduced, and the working efficiency can be increased.