Multifunctional adjustable office chair

The utility model relates to the technical field of office chairs, and discloses a multifunctional adjustable office chair which comprises a chair seat and further comprises an adjusting mechanism, the adjusting mechanism is arranged on the chair seat, and the adjusting mechanism is characterized in that a worm penetrates through one side of the chair seat through a first bearing and is rotationally connected with the chair seat; the first knob is fixedly connected to one end, outside the chair seat, of the worm, the first rotating rod penetrates through the top of the chair seat through a second shaft and is rotationally connected with the chair seat, and the worm gear is fixedly connected to the bottom of the first rotating rod and is meshed with the worm. The double-screw bolt can be driven to rotate by arranging the worm and the worm gear, the armrest can be driven to ascend or descend or rotate by arranging the screw sleeve, the double-screw bolt can be prevented from being exposed in air by arranging th