Auxiliary safety belt mechanism capable of being adjusted to adapt to children

The invention relates to an auxiliary safety belt mechanism capable of being adjusted to adapt to children. The auxiliary safety belt mechanism comprises a retractor, an auxiliary safety belt and a lock catch. The retractor and an original vehicle safety belt are installed on a lower fixing point of an original vehicle seat together, and the auxiliary safety belt is wound on a rotating shaft in the retractor. The auxiliary safety belt is connected with the original vehicle safety belt through the lock catch after being pulled out; one end of the rotating shaft is connected with the center of the clamping groove gear; when the clamping groove gear is locked through the locking device, the auxiliary safety belt is locked. An existing structure of an automobile does not need to be changed, the phenomenon that the neck of a child is tightened by an original automobile safety belt is avoided through the auxiliary safety belt, and the mechanism has the advantages of being fast to assemble and disassemble, fast to s