Abstract: For the residual stress measurement of rolling aluminum alloy using X-ray, the number of diffraction planes in different ψ angular positions is different due to the preferential orientation. The results in the diffraction intensity were different at different ψ angular positions. Consequently, the determination of peak position of θ-2θ is affected and the 2θ-sin2ψ and Ip-sin2ψ appear vibration with different degrees. As a result, the accuracy of the measure results is decreased. In this paper, the variation of different diffraction planes with the intensity distribution of ψ angular position are analyzed by using the "multiply planes measure method". The results show that the diffraction peak intensity and the intensity ratio can be ensured by using the "multiply planes measure method". The measurement results are in good agreement with the theoretical results, which meet the requirement of rolling aluminum measurement.