To simplify the calibration equipment and reduce the calibration cost, the feasibility of mixed calibration about FOG strapdown inertial navigation system（SINS）by using the twoaxis position turntable was investigated in this paper. By analyzing the theory of calibration of accelerometer and gyroscope, a quick sixposition calibration scheme was presented. It takes advantage of earth gravity and angular velocity to stimulate the error of accelerometer and gyroscope to complete calibration. Firstly, the error model of calibration was established Then, the position arrangement scheme was designed. Finally, the experimental verification was carried out. The results show that the fast sixposition method can realize the fast calibration of accelerometer and gyroscope, and the result of scale factor is consisitent with the standard degree factor of traditional calibration precision. Although the value of installation error coefficients and constant has reduced compared with the conventional calibration, it still can meet the requirement of low precisionfiber inertial measurement unit （IMU）, while the calibration time was reduced from 4.5 h to 2 h.