The development process of intelligent turning medical mattress was expounded which was composed of air bag,electromagnetic valve,air pressure sensor,temperature sensor and heart rate sensor.The realization methods of turning over,backing up,benting leg and so on,the electrical control system design were introduced.In order to improve the accuracy of pressure detection,pressure data acquisition and processing methods were introduced.The intelligent turning mattress has characteristic of stable and reliable performance,high intelligence.It can effectively prevent bedsores.