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To solve the problem of poor formability of magnesium alloys, the bending and straightening process was used to successfully introduce large-volume <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mfenced close="}" open="{"><mrow><mn>10</mn><mover accent="true"><mn>1</mn><mo>¯</mo></mover><mn>2</mn></mrow></mfenced></mrow></semantics></math></inline-formula> tensile twins and dynamic recrystallization into the plates, and the comprehensive mechanical properties of the plates were improved, in which the anisotropy index (Lankford value: <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mover accent="true"><mi>r</mi><mo>¯</mo></mover></semantics></math></inline-formula>) decreased by 77%, and the corresponding Erishen value (IE) increased by 88%. The research shows that most of the continuous dynamic recrystallization (CDRX) and discontinuous dynamic recrystallization (DDRX) inherit the grain orientation of the parent grains, and a few have deviations from the parent grains. The twinning-assisted dynamic recrystallization (TDRX) can effectively inherit the grain orientation of the parent grain and retain the orientation relationship of the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mfenced close="}" open="{"><mrow><mn>10</mn><mover accent="true"><mn>1</mn><mo>¯</mo></mover><mn>2</mn></mrow></mfenced></mrow></semantics></math></inline-formula> tensile twin. The cooperation of the pre-set tensile twinning and various dynamic recrystallization processes leads to the deflection of the basal plane, which effectively weakens the basal texture and promotes the activation of various non-basal slip systems. Combined with grain refinement strengthening and dislocation strengthening, the magnesium alloy plate, after bending and straightening, obtains good comprehensive mechanical properties.