Abstract: This paper designed a remote control lifting device based on the combination of AT89C51 single chip microcomputer and pressure sensor to realize the automatic adjustment of DC motor in iver of the high residential floor in many communities,the heavy load on the upper and the lower floors,and the inconvenience of the domestic animals.The pressure signal and the HX711 module are used to convert the pressure signal into voltage signal and send it to the 51 single-chip microcomputer through the A/D conversion module.The MCU adjusts the output frequency according to the data using the PWM wave plus width modulation principle to achieve the purpose of adjusting the DC motor speed.The L298 driver board is used to control the motor's forward and reverse rotation and speed.A transmission system is formed by the coupling,the shaft,the bearing and the fixed pulley for the purpose.The current lifting devices are designed based on industrial requirements,and compared with the current constant speed lifting device,this design can adjust the speed at any time according to the pressure,and the speed is slow when the pressure is large,so that the carrier plate runs smoothly.It saves time,energy,and is simple to install and low in price.It makes the dormitory and residential building more humane.