Abstract: The annealed 2219 aluminum alloy plate was pre-tension deformed and then was treated by solid solution and aging. The effect of pre-tension deformation (0-5.0%) on microstructure and tensile properties of the aluminum alloy was studied. The grain growth behavior after pre-tension during heating was discussed. The results show that when the pre-tension deformation was not larger than 3.5%, the average grain size of the alloy after solid solution varied little, which was about 0.1 mm; when the pre-tension deformation was 5.0%, the grain size increased obviously and the average value was 1.66 mm. When the pre-tension deformation was smaller than 3.5%, the influence of coarse grain was not taken into account during the formulation of pass limit deformation in the multi-pass drawing of 2219 aluminum alloy melon structure. When the pre-tension deformation was larger than 3.5%, the influence of coarse grain should be taken into account. The yield strength and tensile strength of the alloy increased first and then decreased with increasing pre-tension deformation after solid solution and aging treatment, and reached the maximum values of 320, 434 MPa with the pre-tension deformation of 3.0%. After pre-tension with deformation of 5.0%, when the heating temperature was lower than 525 ℃, the grain growth in the alloy was not obvious; when the temperature was higher than 525 ℃, the grain grew instantly and rapidly.