Proposes a method to improve the sensitivity and consistency of stress measurement for steel plates based on magnetoelastic effects. From the framework of the theoretical model of magnetoelastic, it analyzes the roles of strong magnetization and weak AC magnetization:Strong magnetization can improve the sensitivity and consistency of stress measurement by reducing the initial magnetic permeability and unifying the parameters of the magnetoelastic model. Weak AC magnetization provides a minor oscillating magnetic field, which can effectively eliminate the influence of interfering magnetic fields. A finite element simulation study on stress measurement of steel plates based on the magnetoelastic method is conducted, and the results demonstrate that when the initial relative permeability is low, the change rate of normal magnetic induction intensity of the steel plate under stress is relatively high, which indicates a high sensitivity of stress measurement. Tensile experiments are conducted on steel plates with different thicknesses under different strong magnetization conditions to measure the changes in normal magnetic induction intensity. The experimental results show that compared with unmagnetized case, the sensitivity of stress magnetic measurement has been improved by strong magnetization by tens of times, and the consistency has been improved by several to hundreds of times. The stress measurement sensitivity and consistency parameter of 3mm thick steel plates using single magnet moving magnetization method have been improved to 1. 665 mGs/ MPa and 2% . The sensitivity of 5 mm thick steel plates using dual magnets moving magnetization method has been enhanced to 1. 41 mGs/ MPa, and the consistency parameter of 5 mm thick steel plates using single magnetic moving magnetization method has been increased to 0. 2%. The sensitivity and consistency parameter of 7 mm thick steel plates using dual magnets moving magnetization method have been improved to 1. 2 mG/ s/ MPa and 1. 8%.