Random number generation algorithm based on correlation between two channels is adopted.The proposed method eliminates the phase shift in dual Mach-Zehnder（M-Z）fiber sensing system through manipulating the polarization of the input

and improves the correlation of the signals.The feasibility of the generation algorithm and three corresponding parameters are theoretically analyzed.The experimental results indicate that most area of the Poincare sphere can be swept in 5 min.Meanwhile

the optimal position of the polarization can be searched in 3min.Subsequently

the correlation of the signals is improved with a correlation coefficient of 0.9.