SAFETY BELT FASTENING DEVICE AND CHILD SAFETY SEAT THEREWITH

A safety belt fastening device includes a fastening arm. One end of the fastening arm is pivotally connected to a seat body of a child safety seat. The safety belt fastening device further includes an engaging structure connected to the fastening arm and for engaging with the seat body of the child safety seat, and a driving structure for driving the engaging structure to engage with the seat body in a locking status or to disengage from the seat body in a releasing status. The safety belt fastening device and the child safety seat therewith have advantages of easy operation, simple structure, high fastening strength for a safety belt, that the safety belt is not easy to fall off, that the safety belt is easy to release, and capability of meeting needs of different users.