The specimens that can be used for uniaxial tensile at ultra-low temperature were designed, and the mechanical properties of common aerospace aluminum alloy sheet under cryogenic temperature condition (liquid nitrogen, -196 ℃) were tested，which were compared and analyzed with those at room temperature in terms of elongation, strength and work hardening rate. The results show that the elongation, strength and work hardening rate of annealed and solution-treated aerospace aluminum alloy sheet can be significantly improved under cryogenic temperature condition. Therefore,the cryogenic temperature condition could be introduced into the forming process of annealed and solution state aluminum alloy sheet to significantly improve their formability. For aged aluminum alloy sheet, the strength is greatly improved at cryogenic temperature condition, while the work hardening rate is not significantly improved, and the elongation is improved less or even reduced. Therefore, it is not advisable to introduce the ultra-low temperature condition into the forming process of aged aluminum alloy sheet. Cryogenic temperature condition can eliminate the serrated rheological phenomenon of aluminum alloy sheet so as to improve the stability of material rheological stress significantly. Thus, the research results provide directional guidance for the application of cryogenic temperature forming technology and a basis for the optimization of process parameter design.