The invention relates to an ultra-thin mobile phone support. The support comprises a shell body, a left clamping rod, a right clamping rod, a supporting claw and a transmission mechanism, the supporting claw is arranged under the supporting claw and connected with the left clamping rod and the right clamping rod through the transmission mechanism, and the transmission mechanism comprises a left connection rod, a left stirring rod, a right connection rod and a right stirring rod; one end of the left/right connection rod is connected with the supporting claw, the other end of the left/right connection rod is rotatably connected with one end of the left/right stirring rod, a left/right drive gear is arranged at the other end of the left/right stirring rod, and one end of the left/right clamping rod is provided with a left/right driven gear or a left/right driven rack which is meshed with the left/right drive gear. Through tooth meshing of the left clamping rod, the right clamping rod, theleft stirring rod and the right stirring rod, transmission is achieved, in addition, the left clamping rod, the right clamping rod, the left stirring rod and the right stirring rod are in the same plane and are the same in thickness, crossing is not needed, therefore the thickness can be smaller, the occupied space in a car is reduced, and the cleanliness and attractiveness of car interiors are improved.