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In order to improve the reliability and accuracy of the calibration process for the error model of the inertial navigation system and inertial instruments, the paper focuses on the study of control system of angle position turntable. First of all, the hardware of the turntable control system is designed by the data acquisition card PXIe-6363 and the controller PXI-8101 from NI company. After the modeling and analyzing of the control system, a new speed PID control method which can adjust deviation automatically according to the system and amend integral term to accumulate velocity is proposed. Then based on the research of the angle measuring of two-channel resolver, a brand-new approach for error correction for combination of coarse and fine code is advanced also. Finally, the test experiment is carried out and the results show the good decoding speed and accuracy of the axis angle demodulation algorithm, and variable speed PID algorithm greatly improves the system's self-learning ability and robustness, which makes a significant improvement in the stability of the control process.