The invention discloses a multifunctional desk. The multifunctional desk comprises a desktop, desk legs and a bookrack. Each desk leg comprises a fixed support column and an electric push rod and can ascend and descend automatically. The bookrack is arranged along an edge of a rear side of the desktop, and an illuminating lamp and a loudspeaker are mounted on the bookrack. An electric heating device is arranged below the desktop. An infrared distance meter is mounted in the middle of a front side of the desktop. A stop plate is arranged on a lateral side of the desktop, a mini control box is mounted on the back of the stop plate, a control circuit board is arranged inside the control box, and a control panel and a power plug are arranged on the surface of the control box. The multifunctional desk has the advantages that the height of the desk can be adjusted according to needs; the electric heating device below the desktop is capable of providing a warm writing environment for a user in cold weather; by the aid of the infrared distance meter on the front side of the desktop, when the user is too close to or too far away from the desk due to incorrect sitting posture, the loudspeaker sends alarming voice to remind the user of adjusting the sitting posture, and body figure correction of teenagers is benefited.