Automatic height adjusting chair

The utility model discloses an automatic height adjusting chair which comprises a base, a support is arranged on the base, the base is of a box body structure with a hollow top, a motor is fixedly installed on the inner side wall of the base, a second lead screw is rotatably connected to the inner side wall of the base, and a transmission assembly for driving the second lead screw to rotate is arranged on a first lead screw. The first lead screw and the second lead screw are each in threaded connection with two moving sleeves, supporting rods are hinged to the side walls of the four moving sleeves, sliding sleeves are hinged to the top ends of the four supporting rods, two sliding grooves are formed in the bottom of the support, and sliding rods in sliding fit with the two sliding sleeves are fixedly connected to the positions, located in the two sliding grooves, of the support. A motor drives a first lead screw to rotate, the first lead screw drives a driving wheel to rotate, the driving wheel drives a drive