To resolve the problem of the gyro decoupling on two-axis and three-axis photo-electric platforms,and improve their stabilizations,the gyro coupling reason of two-axis photo-electric platform was analyzed,and a secant decoupling algorithm was given.With combination of the principle of flexible dynamic tuning gyroscope and the specific structure of photo-electric platform,the gyro coupling reason of tree-electric platform was discussed,and a sine decoupling algorithm and the ARM-based MCU decoupling hardware and software processing techniques were given.The experimental results indicate that the coupling amplitude value decreases from 22 mV to 3 mV,which means coupling degree decreases by 86.4%.It comes to the conclution that proposed algorithm improves the control performance and stability accuracy when the platform turns at a high speed.