Abstract: A rotary disk friction locking apparatus may have a base and a moving disk assembly rotatably arranged on the base. The top of the moving disk assembly may be used for mounting an automobile seat. A friction brake ring may be fixedly provided on the base. A friction brake block and a driving mechanism that controls movement of the friction brake block may be movably connected to the moving disk assembly. The friction brake block may be arranged on an inner side or an outer side of the friction brake ring. The driving mechanism may drive the friction brake block to move, which can force the friction brake block to frictionally join to a side part of the friction brake ring.