The invention discloses a height-adjustable clothes rack device for high school students. The height-adjustable clothes rack device for the high school students comprises a bearing plate block. Two ends of the bearing plate block are provided with vertical plates. The vertical plates are fixedly installed on the front surface of the bearing plate block. The bearing plate block is provided with a bearing cross plate. The bearing cross plate is fixedly installed on the front surface of the bearing plate block and the bearing cross plate is positioned at the top of the bearing plate block. The bearing cross plate is fixedly provided with a servo motor. The back face of the servo motor is fixedly connected with the bearing plate block. The bearing plate block is provided with a coiling wheel. The back face of the coiling wheel is fixedly connected with the output shaft of the servo motor. The surface of the coiling wheel is fixedly connected with one end of a pull rope. The height-adjustable clothes rack device for the high school students achieves the function of adjusting the height of the clothes rack. A high school student can adjust the height of a hanging hook according to the length of own clothes. The height-adjustable clothes rack device for the high school students has the characteristics of rational design and strong practicability, and is convenient for promotion and application.