Based on rigid-plastic finite element method, the asymmetrical rolling process of high manganese nonmagnetic steel was simulated by finite element software MSC.Marc. The influence of rolling temperature, reduction rate and speed ratio on the shear strain of upper, lower surface and center of the middle section during rolling was analyzed. The results show that: when the speed ratio is 1.00, the shear strain at the center of slab is zero and increases gradually from the center to the surface. With the increase of speed ratio and reduction rate, the absolute value of the maximum shear strain of the middle and lower surface nodes increases, and the absolute value of the maximum shear strain of the upper surface increases first, then decreases. With the increase of rolling temperature,the absolute value of maximum shear strain of upper and lower surface nodes shows a downward trend, while the absolute value of maximum shear strain of intermediate nodes shows an upward trend. The variation of speed ratio and reduction rate has a great influence on the distribution of shear strain, while the variation of rolling temperature has less influence on the distribution of shear strain.